For design the proposed antenna the u shaped slot and a. Two pin diodes are loaded in the slots to produce two different frequency bands. The antenna consists of a uslot patch and eight shorting posts. Study of frequency and polarization reconfigurable on. They are usually employed at uhf and higher frequencies because the size of the antenna is directly tied to the wavelength at the resonant frequency. The two feeds are positioned on the right and left diagonal of microstrip antenna. Pouliguen 1bit reconfigurable unitcell for transmit. An effective design of a novel, compact, single feed, dual patch frequency reconfigurable microstrip patch antenna mpa for wireless communication systems is proposed and studied in this paper. Abstract in this study, a 28ghz uslot rectangular microstrip patch antenna for 5g applications is proposed. P, india abstract reconfigurable microstrip patch antenna with a uslot is proposed for wearable fabric applications.
Study of frequency and polarization reconfigurable on square. Since the two ends of the patch are open, an openend correction is usually taken into account while calculating the physical length l of the patch. 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. Frequency reconfigurable microstrip patchslot antenna with. Request pdf frequency reconfigurable microstrip patch antenna a. The two varactors are located across the unequal u slot, which can switch six different frequencies between 2.
A single patch antenna provides a maximum directive gain of around 69 dbi. Design of reconfigurable microstrip patch antenna for wlan. Frequency reconfigurable uslot microstrip patch antenna. Figure 2 from frequency reconfigurable uslot microstrip patch. Frequency reconfigurable multiband antenna with embedded. Frequency reconfigurable microstrip patch antenna for. It is found that the incorporation of a uslot in the patch can provide a flat input resistance and. Hfss tutorial 2microstrip patch antenna with a cutting slot coaxial feed how to cut slot in patch duration. Microstrips patch antenna with slot array using hfss youtube. The two varactors are located across the unequal uslot, which can switch six different frequencies between 2. The center frequency will be approximately given by. Each edge of the square patch is connected to two shorting posts by pin diodes. This paper presents a technique of frequency reconfigurable microstrip patch antenna for sband applications. Broadband microstrip antenna using variations of uslot has been widely reported.
The patch antenna is realized on fr 4 substrate and having a relative permittivity. Survey on different types of reconfigurable patch antenna. On the use of slots in the design of patch antennas. Survey on different types of reconfigurable patch antenna for. A frequency reconfigurable microstrip patch switchable to slot antenna is proposed. The patch antenna is constructed on same dielectric substrate. Published 2008 in ieee antennas and wireless propagation letters.
A pattern reconfigurable uslot antenna on a microwave substrate is presented. The triple band stub loaded uslot or rectangular slot cut rmsas are discussed. Design frequency reconfigurable microstrip patch antenna for. Their low profile design, often square or rectangular, allows them to be mounted to flat surfaces. It is found that the incorporation of a uslot in the patch can provide a flat input resi. The uslot patch antenna structure consists of a patch, ushaped slot, a ground plane and coaxial feed lines. What is the difference between slot antenna and patch antenna. The geometry of a single patch antenna using uslot with different finite ground dimension feed by microstrip feed line can be shown in figure 1. 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. When the switch is on the electrical size of antenna becomes small and it resonates at higher umts 2100 mhz band with circular. A frequency reconfigurable patch antenna design based on the characteristic mode analysis is presented.
Fabric substrate is used for the proposed antenna for manufactured and designed to steer the beam directions at the operation frequency of 7. However, in most of the reported work, an indepth explanation about the mode introduced by u slot and procedure to design u slot cut antennas at any given frequency is not explained. Basic geometry and basic characteristics of patch antennas 3. For design the proposed antenna the ushaped slot and a. The biasing circuits are integrated into the ground plane. Frequency reconfigurability can also be obtained by modifying feeding structure orand adding parasitic radiators. The designed antenna consists of 4 sub patches which are fixed to the feed line, ground plane. The antenna is capable of frequency switching at nine different frequency bands between 1. Sub patch2 24 10 u slot19,7 sub patch3 24 10 square14,6 sub patch3 24 12 feed line 12. In this study, it is observed that frequency diversity can obtained. It is derive that the resonant frequency is inversely proportional to the slot length and.
Jan 25, 2002 9781424451173 9781424460519 koray surmeli and bahattin turetken u slot stacked patch antenna using high and low dielectric constant material combinations in sband, 2011. The proposed antenna designed on fr4 substrate with dielectric constant 4. By definition, a printed antenna is one that is fabricated using standard photolithography technique. The antenna operates at an upper frequency fu with a broadside pattern, 7. The simple design consists of two slots and two feeds. A quadpolarization and frequency reconfigurable square. Paper 9 presents a novel design of a frequency reconfigurable stacked patch microstrip antenna. In this case, three pin diodes d1, d2, d3 are in on conditions and dimensions of microstrip patch antenna are same as shown in fig. The antenna presents a reconfigurable lower band and a steady band at higher frequencies. Compact reconfigurable dual frequency microstrip antenna using varactor diodes, progress in electromagnetics research,pier 60, 197205, 2006. The most common version of printed antenna is microstrip antenna, which consists of a metallic patch above a ground plane. The slot antenna, consisting of a narrow slit in a ground plane, is a very versatile antenna. The uslot patch antenna structure consists of a patch, u.
Hence the microstrip patch antenna has been proposed and designed to a tunable frequency range from 2. A wideband rectangular microstrip patch antenna with reconfigurable radiation patterns is proposed in this paper, which contains two symmetrically inverted uslots, and incorporates two coaxial probes along the resonant length of the patch. Design and study of compact and wideband microstrip uslot. The proposed antenna is using the dgs technique which uses three pin diodes with three rectangular slots. The shape and size of patch determine the frequency of. In this paper, a compact frequency reconfigurable unequal uslot antenna is achieved by changing the bias voltages of the two varactors. Frequency reconfigurable ushaped microstrip patch antenna and.
Utilizing the shorting pins or shorting walls on the uneven arms of a ushaped patch, uslot patch, or lprobe feed patch antennas, wideband and the dualband impedance bandwidth have been achieved with electrically small size 7. Half u slot loaded semicircular disk patch antenna for gsm mobile phone and optical communications, progress in. Design and analysis of compact u slot microstrip patch. 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.
A frequency reconfigurable microstrip patch antenna is presented. Fundamental structure of the antenna consists of a rectangular patch and a u shaped patch. The antenna consists of two symmetric slots that are fed by a forkshaped microstrip line. Actually, slot antenna is a radiating element formed by a slot in a metallic surface. The uslot antenna concept has been used in patch antenna designed to reduce antenna size. A wideband slot antenna with frequency and patternreconfigurable characteristics for tdlte 3.
With modification, it is amenable to waveguide, coplanar waveguide cpw, coaxial, slot line, or microstrip feeding schemes and has been used in all aspects of wireless and radar applications. In order to produce directional radiation pattern at all frequency bands, a reflector is installed at the back of the frequency reconfigurable slotpatch antenna. A reconfigurable stacked microstrip patch antenna for. Analysis and design of broadband uslot cut rectangular. Sep 11, 2018 frequency reconfigurable u slot microstrip patch antenna. Design of a compact ultrawideband ushaped slot etched on a. Reconfigurable antennas frequency reconfigurable antennas polarisation. Broadband microstrip antenna using variations of u slot has been widely reported. Frequency reconfigurable microstrip rectangular patch antenna using stubs the frequency reconfigurable microstrip antenna is connected to a feed line and two electronic switches. Polarization reconfigurability at each frequency is obtained using two pin diodes d5 and d6. Design of a dualband frequency reconfigurable patch. 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. A compact frequency reconfigurable unequal uslot antenna.
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. By switching between the different states of the pin diodes, the proposed antenna can radiate boresight or conical patterns. Microstrip patch antennas or simply patch antenna are increasingly useful because the antenna is printed directly onto a circuit board. It is found that the incorporation of a uslot in the patch can provide a flat input. Frequency reconfigurable microstrip patchslot antenna.
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. The slot and patch parameters are numerically analyzed to achieve wide bandwidth along with symmetric radiation patterns. Jaiswal department of electronics and communication engineering, sset, shiatsdu, allahabad, india accepted 07 aug 2016. In this study, it is observed that frequency diversity can obtained by. The realized null depth in the difference mode is well below 30 db, which makes the proposed antenna well suited for monopulse radar applications. The shape and size of patch determine the frequency of operation of the antenna and its performance. Slot antenna differs with patch antenna in many aspects.
Design frequency reconfigurable microstrip patch antenna. In this paper a compact reconfigurable antenna with switchable slot is designed and proposed, the slot is etched on the rectangular patch and inclusion of pin diode which is used to switch the slot in on and off states, the patch is fed by a probe coaxial 50. In 15, unequal uslot antenna loaded with two varactors for 6 di. This video shows the design of a microstrip patch antenna in cst microwave studio 2010. Lee, frequency reconfigurable uslot microstrip patch antenna, ieee antennas and wireless propagation letters, vol. The above equation says that the microstrip antenna should have a length equal to one half of a wavelength within the dielectric substrate medium. Ismail frequency recongurable microstrip patchslot antenna with directional radiation. This research presents a frequency reconfigurable antenna scheme for wireless communications worldwide interoperability for microwave access wimax, mobile wimax and wireless local area network, in which a pin diode is utilised for the discrete tuning and a varactor diode for the subsequent finetuning. At the two rf ports an impedance transformer matches the 50.
Reconfigurable microstrip patch antenna with a uslot using. Lee, frequency reconfigurable uslot microstrip patch antenna, ieee antennas wireless propag. Frequency and pattern reconfigurable microstrip patch 2231 6604 volume 2, issue 1, pp. Microstrip antennas are relatively inexpensive to manufacture and design because of the simple 2dimensional physical geometry. Frequencyreconfigurable microstrip patchslot antenna. Approximate equations for the operating frequencies of a single u. The frequency of operation of the patch antenna of figure 1 is determined by the length l. The basic u slot loaded rectangular micro strip patch antenna design. A microcontrollercontrolled embedded biasing network ebn is integrated into the. Additional benefits of patch antennas is that they are easily fabricated making them cost effective. It is found that the incorporation of a uslot in the patch can provide a flat. Design of frequency and patternreconfigurable wideband.
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. At a lower frequency fl, the antenna operates as a planar invertedf. The first resonant frequency shifts down by varying. Frequencyreconfigurable microstrip patchslot antenna ieee antennas and wireless propogation letters, vol. Frequency reconfigurable ushaped microstrip patch antenna and its wireless application satish kumar yadav, a.
May 25, 2019 slot antenna differs with patch antenna in many aspects. May 01, 2018 hfss tutorial 2 microstrip patch antenna with a cutting slot coaxial feed how to cut slot in patch duration. Frequency reconfigurable microstrip circular patch antenna. However, in most of the reported work, an indepth explanation about the mode introduced by uslot and procedure to design uslot cut antennas at any given frequency is not explained. It consists of a square patch of side a printed on rt duroid substrate of. Frequency reconfigurable microstrip patch antenna request pdf.
Frequency reconfigurable ushaped microstrip patch antenna. In the proposed design, a circular patch antenna with circular slot using two pin diodes at the. A quadpolarization and frequency reconfigurable square ring. Jaiswal department of electronics and communication engineering, sset, shiatsdu, allahabad, india accepted 07 aug 2016, available online 14 aug 2016, vol. A wideband rectangular microstrip patch antenna with reconfigurable radiation patterns is proposed in this paper, which contains two symmetrically inverted uslots, and incorporates two coaxial. Double u slot loaded dual frequency microstrip antenna progress in electromagnetic research c, vol.
Reconfigurable c and ku band antenna using duelpatch. A frequencyreconfigurable microstrip patch switchable to slot antenna is proposed. Reconfigurable microstrip patch antenna with a uslot. Patch antenna is actually a patch antenna placed over a antenna base. By placing a variable capacitor and an inductor at the antenna input, the impedance matching frequency of the antenna can be varied. Abstract in this paper, a frequency reconfigurable circular antenna design and development is proposed for wireless devices.
Another example is the design of a microstrip uslot patch antenna that can. Design and analysis of compact u slot microstrip patch antenna. The design used with stubs are open, shorted and balanced stubs three stubs. Design of a dualband frequency reconfigurable patch antenna. Reconfigurable antennas for wireless communications. The structure of the designed reconfigurable antenna is shown in figure 1 and the dimensions of designed antenna were shown in table 1. The antenna consists of a monopole circular patch with radius and feedline length printed on a taconic substrate with relative permittivity of 4. Abstracta frequency reconfigurable microstrip patch antenna is presented. These slot are cut in the ground to produces eight reconfigurable different frequency bands. P, india abstract reconfigurable microstrip patch antenna with a u slot is proposed for wearable fabric applications. 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. Keywords reconfigurable microstrip patch antenna, slots, swi tches, dual band, resonant frequency. In this paper, a compact frequency reconfigurable unequal u slot antenna is achieved by changing the bias voltages of the two varactors. The ground plane serves as the impedancematching circuit, whose impedance depends upon its width as current is mainly distributed.
Frequency reconfigurable ushaped microstrip patch antenna and its. Frequency reconfigurable uslot microstrip patch antenna ieee. Fundamental structure of the antenna consists of a rectangular patch and a ushaped patch. Wideband radiation reconfigurable microstrip patch antenna loaded with two inverted u slots abstract. Frequency and polarization reconfigurable microstrip antenna. The patch antenna is realized on fr 4 substrate and having a. Figure 1 shows the dimensions and geometry of the designed antenna. Design and analysis of double u slot loaded dual frequency. Frequency reconfiguration of microstrip patch antenna with. A 28ghz uslot microstrip patch antenna for 5g applications. Introduction reconfigurability has become a crucial feature in m odern wireless communication world. This paper presents a dual band frequency and polarization reconfigurable microstrip antenna. What is the difference between slot antenna and patch. A slot is etched on the ground plane of the antenna, where two varactor diodes are placed on each side of the slot in order to tune the lower band.
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