Two symmetric uslots are added in an antenna to achieve reconfiguration. The notched frequency is tuned by changing the radius of the semicircular slot and the vertical etched slot whose length is half of the corresponding semicircular etched slot s radius. The slot use on the patch s surface affects the radiation characteristics of proposed antenna. By using slot on rectangular patch with coaxial probe feed a wide bandwidth is achieved.
Design of high gain multiple u slot microstrip patch antenna for wireless system abstract. Eshaped microstrip patch antenna, frequency reconfigurable, rf, pin diode, vswr. Frequency reconfigurable uslot microstrip patch antenna, ieee antennas. A lot of work has been carried out frequency reconfigurable micro strip patch antenna for mobile communication standards summarized in 20. Kaifrequency reconfigurable u slot microstrip patch. A compact frequency reconfigurable unequal uslot antenna. Design of a compact ultrawideband ushaped slot etched on.
The antenna presented in 6 is shown in figure 4, it consists of a radiating circular patch with a slot below the circular patch. The proposed antenna was designed and simulated with ie3d simulator which has resonant frequency of 0. Study of frequency and polarization reconfigurable on. The back feeding port is located in the symmetry axis and 7 mm away from the center of the circular patch. Frequencyreconfigurable eshaped microstrip patch antenna. Wideband radiation reconfigurable microstrip patch antenna loaded with two inverted u slots abstract. By controlling the phase shift of applied currents through these probes, the antenna can be set to excite either the sum or the difference mode. In the proposed method, microstrip patch antenna operates at frequency of 7. Miniaturization of a microstrip patch antenna using slot on ground plane without and with slotted patch has been discussed in 7,8.
The slots on the patch or on the ground plane will help to design a antenna with improved bandwidth and effeciency. Shailander singh khangarot, gajendra sujediya, tejpal jhajharia, abhishek kumar2015 design and fabrication of e slot microstrip patch antenna for wlan application. Microstrip patch antenna, reconfigurable frequency, pin diode. A new microstrip fed triangular patch antenna for rfid applications with u slots has been presented in this paper. Multislotted microstrip patch antenna for wireless communication. Frequency reconfigurable circular patch antenna with an arc. Polarization reconfigurability at each frequency is obtained using two pin diodes d5 and d6. Above concept is used in paper 6 and 4 to obtain multiband operation. Cshaped slot loaded reconfigurable microstrip antenna article pdf available in electronics letters 426.
The antenna is capable of frequency switching at six different frequency bands between 2. In this paper, we demonstrate a novel compact, singlefeed reconfigurable dual frequency square microstrip patch antenna, embedded with a hexagonalshaped slot, having a. Vijay shanker et al frequency reconfigurable microstrip patch antenna for wireless applications using pin diode 927 international journal of current engineering and technology, vol. It has been observed that frequency switching of the proposed microstrip slot antenna is obtained by positioning pin diodes as switch on the slot. The top view of the antenna is a circular patch with radius of 15 mm fed by a coaxial probe. Polarization reconfigurable uslot patch antenna ieee. In order to produce directional radiation pattern at all frequency bands, a reflector is installed at the back of the frequency reconfigurable slotpatch antenna 23.
The design adopts contemporary techniques such as probe feeding and multislotted patch. Introduction microstrip slot antennas invented in 1938 by alan blumlein. In this paper, a compact frequency reconfigurable circular patch antenna with an. Three switches metal strips are used as switch are placed in the slot. Rather than a 12 wavelength of centerfed wire in free space making up a dipole antenna, a dipole slot antenna is usually a. Microstrip patch antennas are widely used in large quantities for their compact size, light weight, low profile, planar configuration, portability, robustness and low fabrication cost. Reconfigurable microstrip patch antenna with a uslot. Multifrequency rectangular microstrip antenna with array. Frequency reconfigurable circular patch antenna with an. In this paper, a compact frequency reconfigurable unequal u slot antenna is achieved by changing the bias voltages of the two varactors. There may or may not be a ground plane on the other side of the substrate. Reconfigurable microstrip antenna array 1 calculation of the width w. Broadband microstrip patch antenna using slot semantic. This paper describes a simple method to design a frequency notched uwb antenna by adding a semicircular slot etched on the radiating patch surface.
Reconfigurable microstrip antenna array ijert journal. In this paper, a novel multislotted microstrip patch antenna with high gain is presented and discussed. In order to produce directional radiation pattern at all frequency bands, a reflector is installed at the back of the frequency reconfigurable slot patch antenna 23. Reply to comments on wideband radiation reconfigurable. A slot antenna is a slot in a flat piece of metal or other conductor. Reconfigurable antennas for wireless communications. Wideband radiation reconfigurable microstrip patch antenna. Reply to comments on wideband radiation reconfigurable microstrip patch antenna loaded with two inverted u slots abstract. Wideband u slot microstrip patch antenna array, appysis of slot coupled microstrip patch antennas a citeseerxa patch antenna is literally a patch of metal or other conductor on a flat surface. Slot loaded compact microstrip patch antenna for dual band. Hence the microstrip patch antenna has been proposed and designed to a tunable frequency range from 2. We appreciate the comments given in 1 on active scattering parameters and realized gain of the antenna in 2. A compact u slot microstrip patch antenna with reconfigurable polarization is proposed for wireless local area network wlan applications. The microstrip patch antenna produces three reconfigurable frequency bands while the slot produces another three frequency bands at the lower frequency region.
A reconfigurable stacked microstrip patch antenna for. In this paper, a novel single feed frequency and polarization reconfigurable microstrip patch antenna is presented. Return loss, directivity, gain and vswr are measured 20. The calculation of patch on antenna are done according to formulas to design microstrip patch antenna. These value are best suited for designing the antenna. The proposed geometry comprised of suspended truncated circular microstrip antenna, with double u slot etched on the radiating element.
The antenna consists of two symmetric slots that are fed by a forkshaped microstrip line. The antenna has low profile with enhanced bandwidth and gain. A lowprofile frequency reconfigurable gridslotted patch. This antenna mainly comprises of a corner truncated square patch with a rectangular ring slot, eight pin diodes and six conductive pads. It can be thought of as sort of the complementary version of a dipole. Frequency reconfigurable uslot microstrip patch antenna abstract. Design and analysis of frequency reconfigurable ushaped slot. The antenna gain was found to be about 8 db for the entire bandwidth. The two feeds are positioned on the right and left diagonal of microstrip antenna. Design of frequency and patternreconfigurable wideband. Frequency and polarization reconfigurable microstrip antenna. Tripathi abstractin this paper, a novel frequency recon. Pdf cshaped slot loaded reconfigurable microstrip antenna.
Frequency reconfiguration and gain enhancement are achieved by. A triangular patch antenna for uhf band with microstrip. The simple design consists of two slots and two feeds. Microstrip square patch antenna using cst by shamsur rahman akash. This paper presents a dual band frequency and polarization reconfigurable microstrip antenna. Compared to other frequency reconfigurable antennas available in the literature, the proposed antenna has advantages of a wide frequency tuning range over a bandwidth of 1. Thus with further addition of a horizontal slot, s11 response is reco rded well below 10 db at both 2. Design of high gain multiple uslot microstrip patch. The u slot microstrip antenna is built with many constraints to get productive output. An investigation of pattern and frequency reconfigurable.
For design the proposed antenna the u shaped slot and a. In this paper they discuss method for getting wider. Microstrip slot antenna has the potential to be a better candidate for frequency reconfiguration because it offers wide frequency range tuning and the conveniences of tuning the resonant frequency. A hexagonal slot loaded square microstrip antenna with dual frequency operation and orthogonal polarization has also been demonstrated 3. Design of the proposed microstrip patch antenna in the literature, various techniques were demonstrated for multiple frequencies antennas with the large width such as l shaped patch, u shaped patch, stacked patch, and e. Pier c online design and analysis of double u slot. Request pdf frequency reconfigurable uslot microstrip patch antenna a. A polarizationreconfigurable high gain microstrip antenna. Introduction 1patch antennas are assigned different names such as printed antennas, microstrip patch antennas or simply. Fabrication of dual band is done and its simulated and measured are observed and compared. Ghanshyam singh, mithilesh kumar, 2012 frequency reconfigurable microstrip circular patch antenna for wireless devies. Frequency reconfigurable uslot microstrip patch antenna. Two pin diodes are loaded in the slots to produce two different frequency bands. Improvement in gain and bandwidth of rectangular and u.
Eshaped slots of the patch to configure the frequencies. A frequencyreconfigurable microstrip slot antenna is proposed. Dimensions of upper patch parameters value dielectric substrate rogers rt5870 dielectric constant. What is the difference between slot antenna and patch. Design of reconfigurable microstrip patch antenna for wlan. The objective of the work is to design a dual frequency microstrip antenna for small frequency ratio applications. A wideband rectangular microstrip patch antenna with reconfigurable radiation patterns is proposed in this paper, which contains two symmetrically inverted u slots, and incorporates two coaxial probes along the resonant length of the patch. Pentagon slot resonator frequency reconfigurable antenna for wideband reconfiguration. A wideband slot antenna with frequency and pattern reconfigurable characteristics for tdlte 3. The two varactors are located across the unequal u slot, which can switch six different frequencies between 2. The antenna consists of a u slot loaded fed patch, stacked with dual u slot loaded rectangular patch to generate the required frequency range.
It is found that the incorporation of a uslot in the patch can provide a flat input resistance and a linear input reactance across a wider bandwidth than the conventional patch antenna. P, india abstract reconfigurable microstrip patch antenna with a u slot is proposed for wearable fabric applications. Frequency reconfigurable patch antennas have attracted significant attention due to their ability to cover multiple frequency bands 1723. A frequency reconfigurable microstrip patch antenna is presented.
Frequency reconfigurable microstrip patch antenna for. Wearable microstrip antennae are suitable for wireless body area network. The design parameters are radius of circular patch, width and length of slot, height of air gap. A novel polarization reconfigurable cut ring microstrip antenna with high gain is proposed. A quadpolarization and frequency reconfigurable square. Microstrip antenna, dielectric constant, frequency, bandwidth, slit, algorithm, optimization program, genetic algorithm, polarization, u slot.
Lee, frequency reconfigurable uslot microstrip patch antenna, ieee antennas wireless propag. Another very popular method for designing a compact multi frequency microstrip patch antenna is the. Dualband is achieved by the placement of a lumped capacitor on a slotted patch antenna, and the two resonant frequencies and their ratio are function of the capacitance value. Another example is the design of a microstrip uslot patch antenna that can. A by deschamps 1 and in france by gutton and baissinot 2. Numerical investigation of graphenebased metamaterial microstrip. Pentagon slot resonator frequency reconfigurable antenna. Reconfigurable dualband patch antenna using varactor. Polarization reconfigurable uslot patch antenna abstract. Frequency reconfigurable tshaped microstrip patch antenna. Fabric substrate is used for the proposed antenna for manufactured and designed to steer the beam directions at the operation frequency of 7.
Frequency reconfigurable microstrip patchslot antenna. Introduction the micro strip antenna concept dates back about 56 years in the u. At fu,the antenna can also support a righthand circular polarization rhcp with a good axial ratio to support a satellite communication system. By placing a variable capacitor and an inductor at the antenna input, the impedance matching frequency of the antenna can be varied. It is established that that two slots in u should be kept closed in a distinct patch to produce a wideband process. Consequently, tuning of both frequencies is allowed by choosing proper capacitor value. Introduction of slot inside t he microstrip patch antenna does not increase the p atch size or changes the radiation pattern but changes t he input impedance of antenna. Pin diodes are appropriately positioned to change the length of the u slot arms, which alters the antenna s polarization state. The microstrip square patch antenna dimensions and ring slot dimensions should be primarily used to achieve frequency reconfiguration between dual frequencies f 1 and f 2. It is found that the incorporation of a u slot in the patch can provide a flat input resistance and a linear input reactance across a wider bandwidth than the conventional patch antenna. Frequency reconfigurable ushaped microstrip patch antenna.
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