Communications: radio wave antennas – Antennas – Microstrip
Patent
1989-09-07
1990-11-27
Hille, Rolf
Communications: radio wave antennas
Antennas
Microstrip
343829, 333 26, H01Q 138
Patent
active
049739727
ABSTRACT:
A circularly polarized microstrip array antenna utilizing a honeycomb substrate made of dielectric material to support on one side the microstrip patch elements in an array, and on the other side a stripline circuit for feeding the patch elements in subarray groups of four with angular orientation and phase for producing circularly polarized radiation, preferably at a 0.degree., 90.degree., 180.degree. and 270.degree. relationship. The probe used for coupling each feed point in the stripline circuit to a microstrip patch element is teardrop shaped in order to introduce capacitance between the coupling probe and the metal sheet of the stripline circuit that serves as an antenna ground plane. The capacitance thus introduced tunes out inductance of the probe. The shape of the teardrop probe is not critical. The probe capacitance required is controlled by the maximum diameter for the teardrop shaped probe, which can be empirically determined for the operating frequency. An aluminum baffle around each subarray blocks out surface waves between subarrays.
REFERENCES:
patent: 2658145 (1953-11-01), Dorne et al.
patent: 4283694 (1981-08-01), Pauker
patent: 4320401 (1982-03-01), Schiavone
patent: 4414550 (1983-11-01), Tresselt
patent: 4477813 (1984-10-01), Weiss
patent: 4543579 (1985-09-01), Teshirogi
patent: 4660048 (1987-04-01), Doyle
patent: 4719470 (1988-01-01), Munson
F. Naderi et al., "NASA's Mobile Satellite Communications Program; Ground and Space Segment Technologies," 35th International Aeronautics Federation Congress, Laussane, Switzerland, Oct. 10, 1984.
V. Jamnejad, "Multibeam Feed System Design Considerations for Single Aperture Large Space Antennas," NASA Conference on Large Space Antenna Technology, Dec., 1984.
K. Woo, "Multiple Beam Antenna Feed Development," 1986 AP-S International Symposium Digest, IEEE Antennas and Propagat. Soc. Publication, pp. 409-412, Jun. 1986.
J. Huang, "Circularly Polarized Conical Patterns from Circular Microstrip Antennas," IEEE Trans. Antennas Propagat., vol. AP-32, No. 9, pp. 991-994, Sep. 1984.
J. Huang, "A Technique for an Array to Generate Circular Polarization with Linearly Polarized Elements," IEEE Trans. Antennas Propagat., vol. AP-34, No. 9, pp. 1113-1124, Sep. 1986.
W. Richards et al., "An Improved Theory for Microstrip Antennas and Applications," IEEE Trans. Antennas Propagat., vol. AP-29, pp. 38-46, Jan., 1981.
P. S. Hall et al., "Gain of Circularly Polarized Arrays Composed of Linearly Polarized Elements," Electron Lett., 1989, 25, pp. 124-125.
Hille Rolf
Jones Thomas H.
Le Hoang-anh
Manning John R.
The United States of America as represented by the Administrator
LandOfFree
Stripline feed for a microstrip array of patch elements with tea does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Stripline feed for a microstrip array of patch elements with tea, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stripline feed for a microstrip array of patch elements with tea will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1034596