Single and dualpolarized slot and patch antennas with wide tuning ranges by carson r. Analysis and designs of wideband dualpolarized antennas for mobile wireless communication systems are presented. Investigation of a novel dual band microstripwaveguide hybrid antenna element mohammad t. A dual frequency and dual sense circularly polarized slot antenna is presented in ref. In patch antenna, it is the fringing fields that are responsible for the radiation. Radiation patterns of dualpolarized patch antenna 24 3. Single feeding is used because it is simple, easy to manufacture, low in cost and compact in structure. Dual polarized slotted waveguide array antenna dogan, doganay m.
This thesis presents a new design for a circularly polarized antenna based on a circular microstrip patch. An experimental study of a dualpolarized lprobe patch antenna is presented. The antenna should be a circular polarized and it needs to manage the harsh environment on the train. Phaseconjugating element using a balanced mixer with an integrated patch. Desing of a circularly polarized patch antenna for satellite communications in lband department of signal theory and communications polytechnic university of cataluna. Finally, a dualpolarized cavitybacked patch antenna is tuned from 0. Department of electrical and electronics engineering supervisor. Abstract this paper presents the characterization of two different dual. Dimensions of the patch are finite along the length.
Below is an example of a dual polarized gapfed patch antenna. This thesis work started with a theoretical study which investigated four common antenna types dipole, loop, pifa and patchmicrostrip to evaluate which antenna. Differential feeds are employed to achieve 30 db porttoport isolation differentialdifferential mode over the tuning range, and the measured crosspolarization level at 0. Design of circular polarized dual band patch antenna. The wideband and dualpolarized operation is achieved through the use of hshaped coupling slots. Dual polarization operation makes the antenna transmit twice as much data compared with a single polarized antenna. Investigation of a novel dual band microstripwaveguide. Chair of committee, kai chang committee members, robert d. As a result a wideband unidirectional antenna, which consists of a planar dipole and a slot, is selected for the antenna element.
Kawser thesis submitted to the faculty of the virginia polytechnic institute and state university in partial fulfillment of the requirements for the degree master of science in electrical engineering dr. The antenna thats presented during this thesis produces a linearly polarized and circularly polarized radiation fields. I would like to clarify whether simply giving a 90 degree phase shift between the inputs at the 2 ports can help getting circular. Antenna pattern for retrodirective anterma using dualpolarized patch anterma 25 3. The main aim of this thesis is to design a wideband dualpolarized microstrip antenna operating at xband. The geometry of the proposed dualpolarized patch antenna is shown in figure 6. A dual circularly polarized single element microstrip. High isolation dualpolarized patch antenna with hybrid.
As an example, the design and implementation of two dual. Retrodirective antenna using dualpolarized patch anterma 24 3. These proposed patch antennas have a thick air substrate, and the 10 db returnloss impedance bandwidths obtained for the two polarizations are all greater than %. Is it possible to design a dual polarized antenna with. Wideband duallinear polarized microstrip patch antenna a thesis by christopher b. Analysis and design of a wideband dualpolarized antenna. To satisfy the requirement on the bandwidth of the antenna, aperture coupled feed structure is chosen. Therefore, the equivalent circuit modeling of a microstrip line fed hshaped slot is also studied in this thesis. This thesis includes the design, production and measurement of a wideband dualpolarized xband aperturecoupled microstrip patch antenna. Single and dualpolarized slot and patch antennas with. The aim of the study is to produce an antenna for transmission of colour video signals between a ground station and a low earth orbit satellite. Abstract a compact dualpolarized monostatic antenna single radiator for transmit and receive modes is presented with differential receive mode operation to achieve excellent interport isolation for 2.
A compact, dualpolarized patch antenna with improved tx. Design of dualpolarized lprobe patch antenna arrays with. This thesis discusses the design of a dual circularly polarized single element antenna with special emphasis on achieving a wide bandwidth and high polarization isolation. This thesis work started with a theoretical study which investigated four common.
The aim of the thesis is to design and fabricate a line feed rectangular microstrip patch antenna and study the effect. Single and dualpolarized slot and patch anten nas with. High isolation 30 db for antenna a, 32 db for antenna b, 35 db for antenna c between the two feeding ports for the entire impedance bandwidth of the proposed antennas can be obtained. Design of dual band dual polarized microstrip patch antennas. The concept for huygens sources, which are combinations of electric and magnetic dipoles, is used.