microstrip antenna calculator. A circular microstrip antenna is designed in order to obtain the required parameter responses from 2. microstrip antenna calculator

 
A circular microstrip antenna is designed in order to obtain the required parameter responses from 2microstrip antenna calculator A microwave brain imaging system model is envisaged to detect and visualize tumor inside the human brain

R w = Terminating resistance between two. It can also be excited indirectly using electromagnetic coupling or by aperture coupling method, in which there are no direct metallic contact between the. With package sizes from 15. 95 mm and 80. 6mm) on the Roger RT/duroid substrate. Though, research is still underway to overcome these deficiencies. Panel antenna “Double Ellipse-rectangle” for 3G. This helps in transfer of energy from transmitter module to antenna. The Cavity model method. This paper reviews the annular-ring microstrip antennas, as proposed in the literature. 2. The tool calculates the antenna dimensions and probe position that generate both circular polarization and the user-defined input impedance. everything RF has created a series of RF calculators to help engineers and students with common calculations that they need to conduct frequently. 3 Easy to analyze using transmission line or cavity models Most common type of patch or microstrip antenna Transmission line model The rectangular microstrip antenna is represented as. For our design, the Dk is 3. 1 GHz and hence it can be used for advance wireless communication applications. For Seeed you can. 5K views•16 slides. For a good antenna performance, a thick dielectric substrate having a low dielectric constant is usually desired since it provides a larger bandwidth. May 18, 2020 By Bill Schweber. Then, a metal strip in the form of a sign (+) is added within the four segments connecting the antenna feeding line to this strip []. The operation frequency of antenna is 15. The paper suggests three areas for further research based on our previous works on microstrip antenna elements and arrays. Microstrip patch antenna is mostly used in modern communication devices over conventional antennas mainly because of their size. Modeling approximation can be used to design the microstrip trace. The microstrip calculator determines the width and length of a microstrip line for a given characteristic impedance (Zo) and electrical length or vice versa. The 1. The vital target of this research article is to constitute the microstrip antennas of Circular. The physical length of an antenna is the actual physical dimensions of the antenna. The length of radiating patch is 12. Use the microstripLine object to create a microstrip transmission line. The antenna is designed using FEM based EM simulator software – Ansoft’s HFSS v13. Part 1 of this FAQ was a brief review of antennas and introduced to microstrip antenna design. used to determine the radius of circular microstrip antenna. ( 0. 5 dBi. Below is the standard input impedance of an inset fed patch antenna at 2. 56mm. MICROWAVE CALCULATOR Free Mobile App for RF/Microwave Engineers. The patch antenna has two radiating slots of length W p. Step 3: Calculation of the Effective length. The microstrip impedance calculator shown above uses Wadell’s equations for microstrip impedance, which can be found in the seminal textbook Transmission Line Design Handbook. The dimensions of antenna can be found in the HFSS simulation file. For example: F=10. A new model based on artificial neural network (ANN) is presented for calculating radius of CSMA. 55. The following formulas are utilized to calculate the outputs if we know the frequency like wavelength, bandwidth, width, distance, and height. Radiation Pattern Characteristics. The simulated result of the array antenna design creates more intensity or centre at the focal point of the radiation with the directivity and gain of 10. The microstrip patch antenna calculator determines the length (L) and width (W) of a rectangular microstrip patch antenna for a given resonant frequency or vice versa. USA CHINA MALAYSIA INDIA ISRAEL UNITED KINGDOM. Some are based on look-up tables, some completely hide their algorithms. The wire diameter affects the shortening factor of both the quarter-wave vertical monopole and the counterpoises in the same way as in the case of a half-wave dipole. 6023 Ω. Panel antenna “Ellipse-patch 2х2” for 2100 MHz band. This paper presents development of microstrip antenna at frequency of 2. 1 Simple Transmission Line Model This transmission line model [8–10] was the first technique employed to analyze a rectangular microstrip antenna by Munson in 1974 [8]. 0×4. The C. 0) eff. The frequency of the signal through the microstrip line. Noise Figure Calculator Calculate noise figure, gain, and noise temperature for a N-Stage cascade device. Key-Words: - Inset-fed, microstrip antenna 1 Introduction Microstrip patch antennas have been widely used particularly since they are lightweight, compact and cost effective. To determine the width (W), the microstrip patch antenna calculator was used to provide an initial starting point. Enter the values of trace width (w), trace thickness. 6 mm thick RT/Duriod 5880 material. This makes Wheeler’s equations discontinuous and brings their accuracy into question when the microstrip width is similar to the height of the microstrip above the conducting plane. In summary, the design process for the coaxial probe placement is simple: Select an operating frequency and stackup. 45 for gold. For a more accurate analysis, use ANSYS HFSS or similar programs. 60mm. The specified antenna. Perform Boolean addition operation on these shapes to join them. So, the Microstrip line was compared to an antenna, and it wasn’t until about 15 years later, when the Microstrip Patch Antenna was proposed, which was based on precisely the same concept. , vol. 45 - empirical coefficient mainly for open end effect. Microstrip antenna (MSA) is a device using to radiate or receive radiation power, consist of a dielectric substrate on one side radiating material called patch and another side perfect conductor called ground plane . The first layer is about 9. The overall antenna size is 78 mm × 78 mm × 1. 2 GHz frequency with edge feeding technique. offices email call. Pasternack's RF Calculators and Conversions section provides engineers valuable and easy-to-use tools ranging from complex mathematical formulas to simple conversions. The microstrip patch antenna is one of the most prominent antennas for THz band applications such future 5G communication systems and advanced wireless communication system. 1< W/H < 3. Low power handling. The microstrip antenna characteristics include the following. S. This video from YouTube, USA, will track you. However, the conventional microstrip antennas inherently suffer as having insufficient gain (8–9 dB), narrow bandwidth (<4%),. Before you get started with the "Microstrip Patch Antenna Array" course, watch the recorded video of a live webinar showing from antenna element design to an antenna array design to platform analysis from element to space - all in one workflow. Use the above equation to calculate the x-coordinate for the probe location. 45GHz. 6 mils line width, and the effective dielectric constant is 6. 10 Overview of Microstrip. microstrip patch antenna. See full list on allaboutcircuits. The antenna is fed by a 50 Ω microstrip line, and a quater wavelength transformer is used for the impedance matching. It is excited via an edge-connected SMA at the end labeledIndex Terms-Microstrip patch antenna, MATLAB calculator, CST, 2. smart antennas ppt santhu652. 3, h = 1. Microstrip is a single trace on the top layer, with no ground close to it on the same layer. 1 Introduction Applications that require low-profile, light weight, easily manufactured, inexpensive, conformable antennas often use some form of a microstrip radiator. PLAY ANYWAY. The following topics are discussed in this eBook: Antenna Characterization. 7K views•29 slides. 6mm thick FR-4 dielectric substrate with dimensions of 46. These methods can be classified into two categories- contacting and non-contacting. Microstrip Patch Antenna Calculators help determine the length and width of rectangular Microstrip Patch Antennas. Fairview Microwave's Microstrip Patch Antenna Calculator determines the length and width (in millimeters) of a rectangular patch antenna. If a solution could be found, τ is increased as long as the length of the boom is shorter than your design goal and as long as τ is smaller than the maximum value of τ = 0. al. Figure 4. ‘f’ is carrier frequency within. Antenna presentation PPT Sachin Kadam. ice. Abstract and Figures. Bessel Lowpass Filter 24 dB/octave; Butterworth Lowpass Filter 24 dB/octave;This tool calculates the matching network necessary to terminate a line of the specified characteristic impedence (Z o) in a specific complex load impedence (R L + jX L) at a specified frequency. Cloverleaf antenna analysis and online calculator. Useful converters and calculators. Our RF calculators and converters will provide the figures you need for your radio frequency engineering needs. 3. This can be achieved by regulating the inner and outer diameter of the coaxial cable, along with the. Antenna design calculators category is a curation of 100 web resources on , HB9CV Online Antenna Calculator, Yagi Uda Antenna Online Calculator, RF Toroid Calculator. Use our microstrip patch antenna calculator; Patch antennas can also be circular or elliptical for a given operating frequency. 45GHz, with my resonator's electrical length at 45 degrees to provide maximum tuning range. Tools. In this antenna, one corner of the patch (or sometimes one edge) is grounded with a ground pin. In this course, we detail microstrip patch antenna array creation as a method of design. Note that antennas are very rarely constructed according to the calculated theoretical dimensions and are always tuned to the lowest standing wave ratio. Most RF Coaxial Cables have an impedance of 50 ohms or 75 ohms. The radiation pattern of microstrip or patch antenna is broad. The microstrip impedance represents the characteristic impedance of the microstrip line, which is the uniform impedance provided by the uniform cross-sectional dimensions along the microstrip (flat copper conductor) length; to prevent signal reflection. HFSS Waveport Size Calculator Figure out the correct waveport size to use in HFSS for a microstrip line feed. Microstrip patch antennas radiate primarily as wide open-open half-wave microstrip resonators. The microstrip antenna is a convenient, planar, easy-to-fabricate antenna with some attractive attributes and features, as well as some distinct limitations. Antenna Toolbox uses the Method of Moments to compute impedance, far field radiation pattern and other properties of the antenna. 4, with a thickness of h=1. 1 - 14. most intuitively appealing models for a microstrip antenna. DESIGN APPROACH A basic microstrip antenna (MSA) is typically low power, low gain (between 5-8 dB) andCloverleaf antenna analysis and online calculator. 6 GHz. (ii) Transmission Line equations: The proposed antenna is designed with the specifications as f o = 2. INTRODUCTION Microstrip antennas basically consist of a radiating patch on one side of a dielectric substrate, which has a ground plane on the other side. Without truncated corners, the array has a single resonant frequency at 2. Where L is the length of the dipoles. It also determines the wavelength and the length adjustment factor k. The application of ANN for designing rectangular microstrip ring antenna with proximity-coupled feed is proposed in Manh et al. For example, a 2 inch microstrip line over an Er = 4. Microstrip patch antennas are used for communication purposes especially in military and civil applications. n = Fresnel Zone number (>0) λ = c/f = wavelength. El diseño de antenas microstrip es compacto, de poco peso y de bajo costo, la elección del material es primordial. Schematic representation of a PCB patch antenna: The calculator is based on simplified formulas for calculating microstrip. Figure 1. Download Andy's analyses on the Adams' resistive splitter Rho: Conductor resistivity relative to copper. The proposed antenna shows that the dualband operation depends on gap between parasitic element, split-ring resonator, length and width of microstrip line. Decreasing τ will decrease both the boom length L and the number of elements N. 3K views•36 slides. Genetic algorithm is a popular optimization technique and has been introduced for design optimization of proximity coupled antenna. Design a broadband microstrip antenna operating over the 450-700 MHz frequency range with a gain of at least 8 dB. The length L of the rectangular patch for the fundamental excitation mode is slightly less than λ/2. 0×25. 2 Overview of Microstrip Antenna A microstrip antenna consists of conducting patch on a ground plane separated by dielectric substrate. You can start with simpler formula: L ≈ 0. This calculator can calculate the impedance and propagation delay of the embedded microstrip. A microstrip width calculator can calculate the width of a microstrip. The microstrip antenna is a convenient, planar, easy-to-fabricate antenna with some attractive attributes and features, as well as some distinct limitations. In [15], a dual-b and antenna is presented, where this 5G antenna radiates at 28 GHz and 38 GHz frequency, where its bandwidth and gain values are 1. Calculators. 1 Design of circular microstrip antenna The geometry of circular microstrip antenna is shown fig. dBm to Watt converter Stripline Impedance calculator Microstrip line impedance Antenna G/T Noise temp. For fixed line impedance on microstrip (such as fifty ohms), dielectric loss is almost constant for any thickness substrate. RF calculations and conversions include metric-standard, link. The surface roughness of the conductor. Moreover, particular attention was paid to keeping the design cost low. 7 dB and 6 dB. Antipodal_Vivaldi_Antenna_Designer. Keywords:The circular microstrip patch antenna's lowest mode is the TM 11 which produces a radiation pattern that is very similar to the lowest order mode of a rectangular microstrip antenna. For more general patch antenna. Hi, Perhaps you can get the formula from the first website and compare it to the other formula and see if they are similar. Horn Antenna 2 Chapter Two: Microstrip Antenna 16 2. Microstrip Calculators Radar Calculators RF Calculators VSWR, Return Loss and Reflection Coefficient Calculators Waveguide Calculators Get the App All Conversion. II. 3 and 1. 02. 3. Description of the original designs. For the microstrip antenna, the x-y plane (θ=90 , 0 T ≤ ≤ 90 and 270 ≤ ≤ 360 ) is the principal E-plane. The microstrip patch antenna calculator determines the length (L) and width (W) of a rectangular microstrip patch antenna for a given resonant frequency or vice versa. Due to space and resource constraints, amateur radio log-periodic antennas are often. The next higher order mode is the. This paper presents a high-band microstrip antenna of dimension (5 × 5 × 1) mm 3 for 5G wireless mobile communications ranging up to 40–45 GHz. We have information from Andy on additional degrees of freedom with Adams' resistive splitters. Matlab/Freemat file 1. Coaxial Cable Impedance Calculator. 1 to 10. 7. Description of the original designs. pAI = design (patchMicrostripInsetfed,4. It has low radiation power and narrow frequency bandwidth. Commonly fabricated with printed circuit board (PCB) technology, a microstrip antenna calculator tool is an electrical transmission line that is able to transmit RF signals. This is achieved by designing a friendly graphical user interface (GUI) for. Microstrip Patch Antennas (or simply. Method of Moments (MoM) method. It is a kind of internal antenna. To maximize signal strength between the transmitter and receiver, the antenna installer needs to keep the obstruction-free direct transmission. This paper describes the use of a logarithmic architecture in the design of microstrip antenna arrays, creating structures with high gain and ultra-wide bandwidth. From the papers, it is found that the gap can be. ‘c’ is propagation velocity within the air. To be more specific, it is the ratio of the electric field intensity E to the voltage V induced across the antenna output terminals. Antenna “Flex” for 3G/4G & Wi-Fi. 123456. Fairview Microwave's Microstrip Patch Antenna Calculator determines the length and width (in millimeters) of a rectangular patch antenna. Benlakehal et al. Microstrip_Patch_Antenna_Calculator. A microstrip line is a microwave transmission line composed of a single conductor strip supported on a dielectric substrate. Reset. 4. Keywords: Circular Microstrip Patch Antenna Design. As the size of the PCB antenna is designed to be very compact and smaller in size, to increase efficiency, several microstrip patches are combined to achieve the desired gain from the minimized size of the antenna. Generally, it. 3. 0×4. This calculator will help you calculate the guided wavelength, provided the dimensions of the microstrip are given as well as the velocity of propagation, the microstrip material's dielectric constant, and the input frequency. The microstrip line is a commonly used transmission line configuration in high-frequency and microwave engineering. The resonant frequency (rf) of a circular patch antenna is approximately given without considering the effect of probe radius by [1]: e r nm r a K c f 2S H * (1. Suntsu Patch Antennas offer GPS and GLONASS communications serving the Smart grid, IOT, Enterprise, Automotive, Telecommunications, and Consumer Wireless Industries. Provide values for H, T, W and the relative permittivity of the dielectric and click the button corresponding to unknown parameter Z o to calculate its value. Height: Height of the substrate. 09/08/2007: Online VSWR calculator added. Figure 2. 2 Low Impedance; The formulas developed in Section 4. These variables are. Helical or Helix Antennas transmit a circular polarized wave. 0×25. We use an interpolation approach. New Relic Instant Observability (I/O) is a rich, open source catalog of more than 400 quickstarts—pre-built bundles of dashboards, alert configurations, and guides—contributed by experts around the world, reviewed by New Relic, and ready for you to install in a few clicks. Microstrip Patch Antenna Calculator; PCB Loop Antenna Calculator; Wokatenna Design; Yagi Uda Antenna Designer (NBS Tech. a (Waveguide width): :This page mentions calculator for NFC antenna of rectangular shape. Equation 11. Use the frequency and layer thickness/Dk value to determine the antenna size. 4. In this paper a slotted microstrip patch antenna has been designed that works for two frequencies 1. 4 GHz. “468” is the constant used to convert frequency in MHz to feet. A Microstrip is a type of electrical transmission line used to transmit RF signals and are commonly fabricated using printed circuit board (PCB) technology. Following is the list of useful converters and calculators. This design approach helps analyzer microstrip inset-fed patch antennas and helps to locate the exact inset length for 50-? input impedance. The waveguide calculator makes it possible to calculate the TEmn / TMmn propagated modes for m = 0,1,2; n = 0. These radio frequency calculators help with unit conversion, attenuator design, antenna design, radars, and various other basic calculators. 8 dBi, and 6. Because they are not enclosed, these PCB microstrips have a lower power handling capability and higher loss, thus allowing you to calculate a microstrip’s height and. Bessel Lowpass Filter 24 dB/octave; Butterworth Lowpass Filter 24 dB/octave;AppCAD Free Design Assistant Tool for Microsoft Windows. The atached figure shows the patch geometry of an inset-fed rectangular patch,. py Here is the simple UI of this tool. In this paper, an inset feed rectangular microstrip patch antenna has been designed and simulated at the frequency of 3GHz and the dependency of antenna performance parameters like return loss, VSWR and other antenna parameters have been successfully studied with the variation of the notch gap using CST microwave studio. The microstrip patch antenna calculator determines the length (L) and width (W) of a rectangular microstrip patch antenna for a given resonant frequency or vice versa. If the feed is located closer to the edge of the patch the input impedance will be high, if the feed is located closer to the center of the patch the impedance will be low. This calculator uses microstrip line for RF and microwave designs and covers mobile phone. 3 and 1 GHz at 28 and 45 GHz, respectively, with gains of 7. 06/27/2007: EM Talk Blog added. Circuit designers classify power loss in microstrip lines into conductor loss, dielectric loss, and radiation loss. They are mostly used at. 56 mm and width is 17. The formula used to calculate inductance of NFC rectangular antenna calculator are also mentioned. Pick out a standard part number from the data sheets listed below. Understanding the dimensions and characteristics of a microstrip line is crucial for designing and analyzing transmission lines, antennas, and RF. The simulated and observative results through HFSS, 10 db impedance bandwidth of rectangular microstrip patch antenna is at 2. Compared to waveguides, microstrip is generally has a lower power handling capacity, and higher losses due to the fact that it is not enclosed. This work presents the parameter design, simulation, and output testing of a microstrip patch antenna that can harvest energy from the Wi-Fi with the resonance. 21 dB. The GP is the omnidirectional antenna. Microstrip Patch Antenna Calculator; PCB Loop Antenna Calculator; Wokatenna Design; Yagi Uda Antenna Designer (NBS Tech. Synthesis is defined as to obtain the dimensions of microstrip patch while providing the resonant frequency, thickness, and dielectric constants of the dielectric material as the input parameters of ANN model (). In this review paper a survey is conducted on commonly used techniques and design. It consists of three elements viz. The calculator also allows you to input the width and height of the substrate. The construction of balun feed line is adopted to provide wideband. 3. Waveguide calculator. The microstrip is a very simple yet useful way to create a transmission line with a PCB. , the patch is treated as a wide piece of a microstrip line. Antenna Calculators. The designed antenna can be used in small handheld. Calculates dimensions of circular microstrip patch antenna, provided frequency, relative permittivity and height of substrate. The. Microstrip Impedance Calculator. The substrate parameters (ε r and h) are required. Description. Metal-Only Antenna. 225mm above the ground plane and the optimized distance of second layer is 11. The. In [14], the bandwidth of a microstrip patch antenna is 1. 1 Introduction. MICROSTRIP ANTENNA In its most basic form, a Microstrip patch antenna consists of a radiating patch on one side of a dielectric substrate which has a ground plane on the other side Structure of a Microstrip Patch Antenna For good antenna performance, a thick dielectric substrate having a low dielectric constant is desirable. well there are a lot of commercially available software's for the desiging microstrip patch antennas such as CST MWS, Ansoft HFSS, FEEKO, Antenna Magus, ADS. This paper provides details on how to investigate a new method of teaching microstrip patch antenna design made by Metamaterials using MATLAB by designing a friendly. h = Dielectric Thickness. 06/27/2007: EM Talk Blog added. For a quarter wavelength antenna, it becomes λ /4 to be fixed. The vital target of this research article is to constitute the. Consider the microstrip antenna shown in Figure 1, fed by a microstrip transmission line. There should be a solid ground in the layer underneath the trace. This antenna is designed on FR-4 substrate and its. 1e-3; L3 = 9. There is also a dielectric material placed above the conductor. Microstrip. 7). For Eurocircuit these information are given in the price calculator interface. 6 mm and a dielectric constant of 4. Microstrip Patch Antenna Calculator Calculate dimensions and edge impedance for desired resonant frequency. 4 GHz-2. 4 Aperture Coupling 3 Chapter Three: Methods of Analysis 22 3. By default, the dimensions are chosen for an resonant frequency of 15 GHz. Use the frequency and layer thickness/Dk value to determine the antenna size. 5mm. Since the antenna is combined in three layers including squares and circles I'm not sure about the propagation polarization. The substrate parameters. If VSWR is known, then the reflection coefficient (Γ), return loss (RL), and mismatch loss (ML) is calculated by using following formulas. 3 The. We offer frequencies 1575. As noted above, curved implementa-tions can be made to conform to aircraft hulls. When playing, some cookies are set and your privacy is futschikato. By using these antennas, an array can be formed to have a superior directivity. Bessel Lowpass Filter 24 dB/octave; Butterworth Lowpass Filter 24 dB/octave;The resonant frequency of an LC Circuit is the frequency at which the inductive reactance and capacitive reactance of the LC circuit are equal. Patch antenna with a quarter-wavelength matching section. This is a tool I developed to assist us at the Cambridge University Spaceflight Club to design a patch antenna for telemetry. . Product Categories; Custom Products. 54 GHz with 2. The length of a half-wavelength dipole can be calculated by the given formula: L =. Microstrip antennas are becoming very widespread within the mobile phone market. applications. If a solution could be found, τ is increased as long as the length of the boom is shorter than your design goal and as long as τ is smaller than the maximum value of τ = 0. The antenna is designed using HFSS tool to determine its dimensions. 2 Microstrip patch antenna designed using IE3D The results tabulated below are obtained after varying the feed location along the length of the patch from the origin (center of patch) to its right most edge. 3678) of its value near the surface. The dielectric substrate has a value of dielectric constant ,but in practical should be low( ), the dielectric substrate thickness. Uda Yagi Antenna dimension calculator Back to Antenna calculator overview. Patch antennas are low cost, have a low profile and are easily fabricated. Feed methods (antenna-transmission line interface) are critical for optimum performance. Step 1: Calculation of the Width (W) -. 1b. In this design note we will stick to a width of. The microstrip antenna (MSA) is a resonant structure that consists of a dielectric substrate sandwiched between a metallic conducting patch and a ground. A new design procedure based on the odd-even mode method to calculate the input impedance of an asymmetric strip folded dipole antenna is presented. Microstrip Line. Your valuable opinion : Avg. dBm to Watt converter Stripline Impedance calculator Microstrip line. This parameter is used for the loss calculations. 53 is designed to have a radius of 0. If the ratio (L/W) is close to unity, the radiation pattern will be symmetric but may not provide a resonable input impedance. The only things that would matter are: 1) if the line length were very long, say 4 inches, the signal will loose some of its power. 53 dB. This tool can calculate rectangular, circular, and triangular patch of. 5e9,ForAI=true) pAI = AIAntenna with properties: Antenna Info AntennaType: 'patchMicrostripInsetfed' InitialDesignFrequency: 4. Whip Antenna Design Calculator Daycounter, Inc. An aperture coupled antenna eliminates the direct electricalmicrostrip antenna is the best choice for modern wire-less and mobile applications4–6. In this paper, theoretical analysis of microstrip line fed rectangular patch antenna loaded with parasitic element and split-ring resonator is presented. The dorminant TM 10 mode which the patch antenna radiates upward from the ground plane is excited byThe proposed microstrip Yagi-Uda antenna on photonic crystal substrate (with air gaps) operates frequency ranging from 5. 2- Microstrip Antenna Feed Techniques Microstrip patch antennas can be fed by a variety of methods. However, microstrips cannot handle power levels as high as waveguides can. Below is the standard input impedance of an inset fed patch antenna at 2. It consists of a conductor trace on a dielectric substrate with a ground plane. Since the current has a sinusoidal distribution, moving in a distance R from the end will increase the current by cos (pi*R/L) - this is just. Abstract: Microstrip antenna is gathering a lot of interest in communication systems. Batwing antenna - super wideband bat wings for 3G/4G. This calculator can calculate the impedance and propagation delay of the embedded microstrip. Since they are just patterns of metallization on a substrate, the microstrip device is far cheaper than the traditional waveguide, as well as being more compact and lighter. Pasternack's Microstrip Patch Antenna Calculator determines the length and width (in millimeters) of a rectangular patch antenna. Antenna “Flex” for 3G/4G & Wi-Fi. Here are two spreadsheets on extra degrees of freedom for Adams' resistive splitter.