Open ends of two microstrip lines excite orthogonal currents on the patch by the capacitive coupling through a small gap at the patch edge. Design of dual band dual polarized microstrip patch antennas. This thesis presents a new design for a circularly polarized antenna based on a circular microstrip patch. Abstract a new dualpolarized slotcoupled microstrip patch antenna is presented, which can achieve highisolation low cross polarization levels, a wide bandwidth, and low backward radiation levels. In one hand, its lower operating frequency demonstrates high gain and on the other hand, the upper operating frequency shows circular polarization. One of the characteristics of this antenna is its flexibility for different applications.
The work presented in this paper concentrates on a unit cell with 2 2 radiating slots which is easily expandable to a bigger antenna. The patch is of rectangular shape and fed by a gap between the. The designed antenna is fabricated and its performance is measured and compared. A high isolation and wideband dualpolarized microstrip patch antenna fed by hybrid ring feeding network has been proposed in this paper. A wideband twindiamondshaped circularly polarized patch. The idea of a dual polarized gap fed patch antenna presented in this paper is new and authors own contribution. Two different feeding mechanisms are designed to excite two orthogonal modes on a single radiating patch. The location of the slots with respect to the patch is defined by the dimensions w and l figure 1a shows the geometric layout of a proposed singlefeed circularly polarized slotted rectangular microstrip patch antenna. A singlefeed dual band circularly polarized stacked microstrip patch antenna with a smallfrequency ratio is presented.
The linear polarization performance of the antenna is based on a pair of arcshaped slots embedded in a circular patch antenna. The first approach begins with a new patch antenna that provides dualband dualpolarized operation by means of an opencircuit stub, added at the open end of the feed line. The patch and feed dimensions were maintained from the 1x2 dual linear polarized designs when designing 1x4 arrays antenna. In order to cater to increased wireless communication traffic, dualpolarized antennas are required having broad bandwidths and. In this work a new design of a cpw fed circularly polarized square slot antenna by combining previous methods and improve some part for getting better results is presented. For a typical nelement oamgenerating circular phased array, the element should be fed with the uniform amplitude but with a successive phase.
Simulations and tests shows that the antenna is circular polarized and have a. Gap feeding at the edge of a rectangular patch antenna is proposed for the first time in this paper. The antenna consists of circular patch and 3 db hybrid coupler. To meet these requirements many various dual polarized antennas have been developed 16. Singlefeed circularly polarized stacked patch antenna. Two asymmetric pairs of hexagonal slots are etched on the four sides of the patch. Dualpolarized aperturecoupled wideband microstrip patch. The loss resistance, models the ohmic resistance that would dissipate the same power that is lost in the antenna. Design of circular polarized dual band patch antenna. A wideband single fed circularly polarized patch antenna and a wideband circularly polarized antenna with suspended candylike patch were introduced 9, 10, which obtained a wide impedance and polarization bandwidth but made use of two or three layers substrates leading to difficulty of fabrication and adjustment. New types of microstrip antennas for uhf applications. A new dualpolarized horn antenna fed by a microstrip patch is proposed. Dual polarized microstrip patch antennas could provide these features with low cost and easy fabrication.
In this paper, a dualpolarized patch antenna capacitively coupled through four feeds is proposed. This study introduces a new design of dual band circular polarized cp microstrip antenna for ism band applications 2. The dual fed circular polarized microstrip antenna is etched on a fr4 with dielectric substrate of 4. Ultrawideband dualpolarized patch antenna with four. Dualpolarized antennas are used to achieve polarization diversity in order to increase the capacity and reliability of wireless communication links. Highisolation dualpolarized microstrip antenna via. In order to cater to increased wireless communication traffic, dualpolarized antennas are required having broad bandwidths and high isolation between two orthogonal ports. A multilayer organic package with 64 dualpolarized. The steps to model and analyze a probe fed stacked patch antenna. Comparative analysis of microstriplinefed gapcoupled. Pdf a new dualpolarized gapfed patch antenna researchgate. A new dualpolarized horn antenna excited by a gapfed. An attempt is made to improve the impedance bandwidth s 11 of a microstrip antenna by means of the gap coupling method, yielding a bandwidth of 97. The objective of this thesis is to design a single fed circularly polarized microstrip antenna that operates at 2.
A wideband circularly polarized patch antenna for 60 ghz. A compact dualpolarized double shaped patch antenna with. Dualband and dualpolarized siwfed microstrip patch antenna abstract. Furthermore, the proposed antenna is stacked using an upper circular patch thus achieving a dual band circularly polarized pattern. Dualpolarized slotcoupled planar antenna with wide. Circularly polarized s band dual frequency square patch.
Dualband stacked circularly polarized microstrip antenna. A system of two dual band dualpolarized antennas is proposed. The selected microstrip antenna is a dual fed circular polarized microstrip antenna. Single feeding is used because it is simple, easy to manufacture, low in cost and compact in structure. Pdf a new dualpolarized horn antenna fed by a microstrip patch is proposed. The proposed design consists of two pairs of small parallel slots on the. Rl loss resistance of the antenna the radiation resistance is the ohmic resistance and it is used to represent the power delivered to the antenna for radiation. Ghz, thereby making it suitable for lte applications. In this paper, a lowprofile duallinear polarized patch antenna composed of two stacked substrates, one air gap layer, and one grounded substrate is propo. Single feed dual band circularly polarized microstrip. By adding a stub to the end of the feed line, one can make an antenna with two resonant frequencies. The new dual polarized selfgrounded bowtie antenna has many advantages. Pier c online a new dualpolarized gapfed patch antenna. A dual polarized shorted microstrip patch antenna for wideband application kenny s.
P broadband microstrip antennas, artech house, usa 2003. Research article design and investigation of differential. Compact dualband dualpolarized antenna for mimo lte. Pdf a new dualpolarized gapfed patch antenna bierng. In this paper, a new feeding structure is applied in the patch antenna design to overcome undesirable features of the earlier multilayer feeding structures while maintaining their interesting features. Two pair of orthogonal slits is cut on the lower circular patch for achieving circular polarization and truncated corner square patch is used as the upper parasitic element. High isolation dualpolarized patch antenna with hybrid. A microstrip feed line has connected to the patch from the edge of the substrate. Microstrip patch antennas have become the favorite of antenna designers because of its versatility and advantages of planar profile, ease of fabrication, compatibility with integrated circuit technology, and conformability with a shaped surface. Can be somewhat difficult to obtain true cp 0db axial ratio.
Some of these works have used an aperturecoupled feed to improve bandwidth and isolation. Pdf in this paper, a new compact dualpolarized microstrip patch antenna is proposed. A dual polarized microstrip patch antenna fed by quasicrossshaped slot with the ports isolation higher than 35 db has been discussed in 18. Singlefeed dualpolarized high gain microstrip antenna. The stacked patch configuration is one of the ways of increasing the impedance bandwidth of these antennas. Dualband and dualpolarized siwfed microstrip patch antenna. A new cpwfed circularly polarized square slot antenna.
The horn consists of two microstrip lines, a gapfed dualpolarized patch, a square waveguide and a pyramidal horn. New types of microstrip antennas for the applications typically, patch antennas are narrowband and their q factor is inversely proportional to frequency. A lowprofile dualpolarized patch antenna with bandwidth. It was decided to design a patch antenna from the theoretical study since it fulfils all the requirements for the antenna. The profile increases due to the structure of ushaped folded. Compared with other dual polarized patch antennas reported, the bandwidth of the proposed antenna is significantly increased and an impedance bandwidth of over 110% is. Two longitudinal and transverse slots on the broad wall of the substrate integrated waveguide siw are responsible for creating two different frequency bands with distinct polarization.
Single feed dual band circularly polarized microstrip patch antenna written by saurav mehta, pradeep kumar published on 20150223 download full article with reference data and citations. The hybrid ring feeding network has a fully symmetric structure and performance of high isolation within a wide bandwidth. The patch is of rectangular shape and fed by a gap between the patch edge and a microstrip open end. The patch is excited in two orthogonal polarizations by small gaps. As there is currently an urgent need for graduate students and practicing engineers to gain an indepth understanding of this subject, this book was. The patch is excited in two orthogonal polarizations by small gaps between the patch. The standard rectangular microstrip patch antenna has a narrow impedance bandwidth typically lesser than 5%.
A new dualband and dualpolarized antenna is investigated in this letter. In this work, a novel singlefeed stacked microstrip antenna is proposed for high gain and dual polarization application. The design is composed of two compact orthogonal monopoles printed close to each o. Cp bandwidths comparable to the impedance bandwidth of the patch antenna are usually possible. Department of electronics and communication engineering national institute of technology rourkela 769008 certificate this is to certify that the work in the thesis entitled dual band and dual polarized microstrip patch antenna. A dual band dual polarization slot patch antenna for gps. Based on simulated results, the impedance bandwidth is about 108 %, totally inclusive the 3 db ar bandwidth, which is about 57 %. Microstrip patch antennas have become the favorite of antenna designers because of their versatility and having the advantages of planar profile, ease of fabrication, compatibility with integrated circuit technology, and conformability with a shaped surface. The isolations of these antennas are about than 34 db, and bandwidth achieves 20 %. In this paper, we present a dual band antenna with appropriate polarizations in the gps and wifi bands. Microstrip gap proximity fedpatch antennas, analysis, and. The patch is fed by two perpendicular capacitive discs in gap. Dual feed microstrip patch antenna for wlan applications.
The patch is excited in two orthogonal polarizations. Design of compact fshape microstrip antenna for dual polarized. In this paper, a new compact dualpolarized microstrip patch antenna is proposed. Microstrip patch antennas kai fong lee, kwai man luk. The proposed antenna is analyzed and optimized using the widelyused electromagnetic simulation software microwave studiotm mws by cst. Abstracta new dualpolarized horn antenna fed by a microstrip patch is proposed. A new circular polarization dual feed microstrip square. A new dualpolarized horn antenna excited by a gapfed square patch. Design of stacked microstrip dualband circular polarized.
The 12th international conference interdisciplinarity in engineering a new circular polarization dual feed microstrip square patch antenna usi g bran h coupler feeds for wlanhiperlan applications mahmoud moubadir a, 0f, imane badaouia, naima amar touhamia. The results of this unit cell are promising since the impedance bandwidth is greater than 15% and a symmetric. Smith chart of single patch dual feed aperture coupled antenna. There is a feeding patch element with two excited probes placed on the top side of. A computeraided design model based on the artificial neural network ann is proposed to directly obtain patch physical dimensions of the singlefeed cornertruncated circularly polarized microstrip antenna cpma with an air gap for wideband applications. The proposed dual band cp microstrip antenna with compact design has achieved design intention of having return loss of dualpolarized slottedwaveguide antenna based on gap waveguide technology is designed for vband.
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