Thesis
Bandwidth improvement for simultaneous transmit and receive (STAR) patch antennas with parasitic patches
Washington State University
Master of Science (MS), Washington State University
2019
Handle:
https://hdl.handle.net/2376/101925
Abstract
Two types of microstrip patch antennas for simultaneous transmit and receive (STAR) applications are proposed with enhanced bandwidth using different kinds of parasitic patches for 2.4-2.5 GHz ISM band. Both designs use a 180° hybrid coupler and place the receive (Rx) and transmit (Tx) ports on different substrate layers to maintain the isolation between the Rx and Tx signals for the STAR requirement. The first design has four spiral-shape parasitic patches around a radiating patch shared by Tx and Rx ports. The second design uses separate radiating patches for Rx and Tx, and there are additional rectangular parasitic patches underneath the Tx patches. The first antenna possesses 98 MHz Rx bandwidth and 113 MHz Tx bandwidth from simulation and 80 MHz Rx bandwidth and 115 MHz Tx bandwidth from measurement. The second antenna has a simulated bandwidth more than 110 MHz covering 2.4 GHz and 2.5 GHz for both transmission and reception. The measured Rx bandwidth of the second design is 155 MHz from 2.485 GHz to 2.64 GHz, and the measured Tx bandwidth has two operating bands: one from 2.445 GHz to 2.515 GHz and the other from 2.585 GHz to 2.665 GHz. The two designs achieve polarization differences about 20 dB to 40 dB in their radiation patterns. They also have more than 2.5 dB gain and 50 dB isolation between 2.4 and 2.5 GHz. Such isolation allows the antenna to be used for STAR communication.
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Details
- Title
- Bandwidth improvement for simultaneous transmit and receive (STAR) patch antennas with parasitic patches
- Creators
- Kuei Jih Lu
- Contributors
- Tutku Karaçolak (Degree Supervisor)
- Awarding Institution
- Washington State University
- Academic Unit
- Electrical Engineering and Computer Science, School of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; [Pullman, Washington] :
- Identifiers
- 99900525284401842
- Language
- English
- Resource Type
- Thesis