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