A PHYSICALLY SMALL DUAL CIRCULAR MICROSTRIP ANTENNA
International Telemetering Conference Proceedings / October 24-27, 1983 / Sheraton-Harbor Island Hotel and Convention Center, San Diego, California === The microstrip antenna has recently gained popularity because it offers the advantage of flush mounting, small size, and low cost when fabricated b...
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| Language: | en_US |
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International Foundation for Telemetering
1983
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| Online Access: | http://hdl.handle.net/10150/612154 http://arizona.openrepository.com/arizona/handle/10150/612154 |
| Summary: | International Telemetering Conference Proceedings / October 24-27, 1983 / Sheraton-Harbor Island Hotel and Convention Center, San Diego, California === The microstrip antenna has recently gained popularity because it offers the advantage of
flush mounting, small size, and low cost when fabricated by etched circuit techniques. In
an effort to further reduce the aperture requirements, two circular microstrip antennas were
placed one on the other and fed independently. Utilization of the field null at the center of
the circular disk antenna allows independent excitation. In this configuration, two different
frequencies can be transmitted simultaneously while sharing the same physical aperture.
Polarization of the antennas is linear with well behaved radiation patterns exhibiting gains
of 6 dBi. Moderate power levels can be accommodated by selection of suitable substrates
and control of dielectric thickness.
As a result of the reduced size, the antenna can now be placed in areas otherwise thought
impractical. Placement in front of certain antennas or retrodirective reflectors has a very
minor effect on their performance. |
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