Investigation of a novel dual band microstripwaveguide hybrid antenna element mohammad t. The antenna should be a circular polarized and it needs to manage the harsh environment on the train. 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. Diploma thesis highefficiency dualpolarized patch antenna array with common waveguide feed robert vilaltella esteve start date.
Differential feeds are employed to achieve 30 db porttoport isolation differentialdifferential mode over the tuning range, and the measured crosspolarization level at 0. I would like to clarify whether simply giving a 90 degree phase shift between the inputs at the 2 ports can help getting circular. Dual polarization operation makes the antenna transmit twice as much data compared with a single polarized antenna. Finally, a dualpolarized cavitybacked patch antenna is tuned from 0. The concept for huygens sources, which are combinations of electric and magnetic dipoles, is used.
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 %. 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. The objective of this thesis is to design a single fed circularly polarized microstrip antenna that operates at 2. Department of electrical and electronics engineering supervisor.
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. 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. Single and dualpolarized slot and patch antennas with wide tuning ranges by carson r. The geometry of the proposed dualpolarized patch antenna is shown in figure 6. As antenna 1 is a rectangular microstrip patch antenna it can be represented as an array of two radiating apertures. This thesis work started with a theoretical study which investigated four common. Dual polarized slotted waveguide array antenna dogan, doganay m. Desing of a circularly polarized patch antenna for satellite communications in lband department of signal theory and communications polytechnic university of cataluna. To satisfy the requirement on the bandwidth of the antenna, aperture coupled feed structure is chosen.
A dual frequency and dual sense circularly polarized slot antenna is presented in ref. Phaseconjugating element using a balanced mixer with an integrated patch. Below is an example of a dual polarized gapfed patch antenna. Investigation of a novel dual band microstripwaveguide. The wideband and dualpolarized operation is achieved through the use of hshaped coupling slots. An experimental study of a dualpolarized lprobe patch antenna is presented. Abstract this paper presents the characterization of two different dual.
Design of circular polarized dual band patch antenna. Antenna pattern for retrodirective anterma using dualpolarized patch anterma 25 3. This thesis presents a new design for a circularly polarized antenna based on a circular microstrip patch. Analysis and design of a wideband dualpolarized antenna. The main aim of this thesis is to design a wideband dualpolarized microstrip antenna operating at xband. The antenna thats presented during this thesis produces a linearly polarized and circularly polarized radiation fields. Chair of committee, kai chang committee members, robert d. Wideband duallinear polarized microstrip patch antenna a thesis by christopher b. Also, improved crosspolarization levels 20 db in both e and h plane patterns for the two polarizations of antennas b and c are achieved. 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. Single and dualpolarized slot and patch anten nas with. 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.
Is it possible to design a dual polarized antenna with. Analysis and designs of wideband dualpolarized antennas for mobile wireless communication systems are presented. The aim of the thesis is to design and fabricate a line feed rectangular microstrip patch antenna and study the effect. As an example, the design and implementation of two dual. The aim of this thesis work is to design and build a rfid antenna to send data from the monitoring system to the rfid readers. Retrodirective antenna using dualpolarized patch anterma 24 3. High isolation dualpolarized patch antenna with hybrid. D thesis,gastric cancer phd thesis acknowledgements dissertation family dissertation titles in rguhs phd thesis on patch antenna master thesis in communication engineering.398 1567 433 520 697 1110 1050 179 1036 1558 990 484 9 1215 435 430 979 1494 487 382 1431 742 657 1531 585 387 832 596 342 687 569 577 427 1250 1395 1196 1410 882 177 809 939