In this paper, we present a dual band antenna with appropriate polarizations in the gps and wifi bands. The patch is excited in two orthogonal polarizations. 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. Some of these works have used an aperturecoupled feed to improve bandwidth and isolation. In one hand, its lower operating frequency demonstrates high gain and on the other hand, the upper operating frequency shows circular polarization.
A new circular polarization dual feed microstrip square. 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. A new dualpolarized horn antenna excited by a gapfed square patch. A dual polarized shorted microstrip patch antenna for wideband application kenny s.
Cp bandwidths comparable to the impedance bandwidth of the patch antenna are usually possible. The isolations of these antennas are about than 34 db, and bandwidth achieves 20 %. The patch is fed by two perpendicular capacitive discs in gap. P broadband microstrip antennas, artech house, usa 2003. 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 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. High isolation dualpolarized patch antenna with hybrid. It was decided to design a patch antenna from the theoretical study since it fulfils all the requirements for the antenna. The idea of a dual polarized gap fed patch antenna presented in this paper is new and authors own contribution. 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.
A compact dualpolarized double shaped patch antenna with. The main reason for the high q factor is that patch antennas are essentially circuits printed on a relatively thin substrate. The hybrid ring feeding network has a fully symmetric structure and performance of high isolation within a wide bandwidth. The objective of this thesis is to design a single fed circularly polarized microstrip antenna that operates at 2. A wideband twindiamondshaped circularly polarized patch. The selected microstrip antenna is a dual fed circular polarized microstrip antenna.
The design is composed of two compact orthogonal monopoles printed close to each o. A new dualband and dualpolarized antenna is investigated in this letter. Microstrip patch antennas kai fong lee, kwai man luk. The steps to model and analyze a probe fed stacked patch antenna. 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. A microstrip feed line has connected to the patch from the edge of the substrate. 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 new dual polarized selfgrounded bowtie antenna has many advantages.
Can be somewhat difficult to obtain true cp 0db axial ratio. Single feed dual band circularly polarized microstrip. 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. The loss resistance, models the ohmic resistance that would dissipate the same power that is lost in the antenna. The work presented in this paper concentrates on a unit cell with 2 2 radiating slots which is easily expandable to a bigger antenna. A dual polarized microstrip patch antenna fed by quasicrossshaped slot with the ports isolation higher than 35 db has been discussed in 18. Design of compact fshape microstrip antenna for dual polarized. Dualpolarized slotcoupled planar antenna with wide.
A lowprofile dualpolarized patch antenna with bandwidth. Compact dualband dualpolarized antenna for mimo lte. The dual fed circular polarized microstrip antenna is etched on a fr4 with dielectric substrate of 4. Dual polarized microstrip patch antennas could provide these features with low cost and easy fabrication. The linear polarization performance of the antenna is based on a pair of arcshaped slots embedded in a circular patch antenna. Two asymmetric pairs of hexagonal slots are etched on the four sides of the patch. Dualband stacked circularly polarized microstrip antenna.
Highisolation dualpolarized microstrip antenna via. A new dualpolarized horn antenna fed by a microstrip patch is proposed. To meet these requirements many various dual polarized antennas have been developed 16. 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. Open ends of two microstrip lines excite orthogonal currents on the patch by the capacitive coupling through a small gap at the patch edge. A new dualpolarized horn antenna excited by a gapfed. Abstracta new dualpolarized horn antenna fed by a microstrip patch is proposed. 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. New types of microstrip antennas for uhf applications. The patch is of rectangular shape and fed by a gap between the patch edge and a microstrip open end. Dual linearly polarized microstrip array antenna intechopen. Single feeding is used because it is simple, easy to manufacture, low in cost and compact in structure.
Based on simulated results, the impedance bandwidth is about 108 %, totally inclusive the 3 db ar bandwidth, which is about 57 %. By adding a stub to the end of the feed line, one can make an antenna with two resonant frequencies. In order to cater to increased wireless communication traffic, dualpolarized antennas are required having broad bandwidths and. The stacked patch configuration is one of the ways of increasing the impedance bandwidth of these antennas.
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 standard rectangular microstrip patch antenna has a narrow impedance bandwidth typically lesser than 5%. Pier c online a new dualpolarized gapfed patch antenna. A multilayer organic package with 64 dualpolarized. Simulations and tests shows that the antenna is circular polarized and have a.
Circularly polarized s band dual frequency square patch. Pdf a new dualpolarized gapfed patch antenna bierng. A new cpwfed circularly polarized square slot antenna. Pdf a new dualpolarized horn antenna fed by a microstrip patch is proposed. A singlefeed dual band circularly polarized stacked microstrip patch antenna with a smallfrequency ratio is presented. The patch is of rectangular shape and fed by a gap between the. 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. In order to cater to increased wireless communication traffic, dualpolarized antennas are required having broad bandwidths and high isolation between two orthogonal ports.
The proposed antenna is analyzed and optimized using the widelyused electromagnetic simulation software microwave studiotm mws by cst. For a typical nelement oamgenerating circular phased array, the element should be fed with the uniform amplitude but with a successive phase. Comparative analysis of microstriplinefed gapcoupled. This thesis presents a new design for a circularly polarized antenna based on a circular microstrip patch. There is a feeding patch element with two excited probes placed on the top side of. The proposed design consists of two pairs of small parallel slots on the. The horn consists of two microstrip lines, a gapfed dualpolarized patch, a square waveguide and a pyramidal horn. Dualpolarized aperturecoupled wideband microstrip patch. Pdf a new dualpolarized gapfed patch antenna researchgate. 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. The results of this unit cell are promising since the impedance bandwidth is greater than 15% and a symmetric. 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. 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. 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.
This study introduces a new design of dual band circular polarized cp microstrip antenna for ism band applications 2. One of the characteristics of this antenna is its flexibility for different applications. Ghz, thereby making it suitable for lte applications. The designed antenna is fabricated and its performance is measured and compared. Smith chart of single patch dual feed aperture coupled antenna. The patch is excited in two orthogonal polarizations by small gaps. Design of circular polarized dual band patch antenna. Dualpolarized antennas are used to achieve polarization diversity in order to increase the capacity and reliability of wireless communication links. Dualband and dualpolarized siwfed microstrip patch antenna abstract. Dualband and dualpolarized siwfed microstrip patch antenna. In this paper, a lowprofile duallinear polarized patch antenna composed of two stacked substrates, one air gap layer, and one grounded substrate is propo.
A system of two dual band dualpolarized antennas is proposed. Singlefeed dualpolarized high gain microstrip antenna. The profile increases due to the structure of ushaped folded. The patch and feed dimensions were maintained from the 1x2 dual linear polarized designs when designing 1x4 arrays antenna. In this work, a novel singlefeed stacked microstrip antenna is proposed for high gain and dual polarization application. Dual feed microstrip patch antenna for wlan applications. Design of stacked microstrip dualband circular polarized. Singlefeed circularly polarized stacked patch antenna. Furthermore, the proposed antenna is stacked using an upper circular patch thus achieving a dual band circularly polarized pattern. 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. In this paper, a novel coupled fed single or dual polarized patch antenna is proposed. Design of dual band dual polarized microstrip patch antennas. A wideband circularly polarized patch antenna for 60 ghz.
Research article design and investigation of differential. As there is currently an urgent need for graduate students and practicing engineers to gain an indepth understanding of this subject, this book was. A high isolation and wideband dualpolarized microstrip patch antenna fed by hybrid ring feeding network has been proposed in this paper. 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. A dual band dual polarization slot patch antenna for gps. Microstrip gap proximity fedpatch antennas, analysis, and. In this paper, a dualpolarized patch antenna capacitively coupled through four feeds is proposed. Two different feeding mechanisms are designed to excite two orthogonal modes on a single radiating patch.
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