Communications: radio wave antennas – Antennas – Microstrip
Patent
1992-05-29
1994-02-15
Hille, Rolf
Communications: radio wave antennas
Antennas
Microstrip
343853, H01Q 138, H01Q 1308, H01Q 2122, H01Q 2124
Patent
active
052871169
ABSTRACT:
A microstrip antenna is disclosed which comprises a ground conductor plate and a patch opposed to the ground conductor plate with a particular distance, a transmission feed line and a reception feed line being disposed between the ground conductor plate and the patch. Signals are fed from these feed lines to the patch by electromagnetic coupling. The angle made by the extended lines of these feed lines is nearly 90.degree.. When four patches are disposed in a square arrangement, the transmission feed line feeds signals in directions of first lines which pass through the center point of each patch in such a way that the directions are line-symmetrical with respect to a horizontal line and a vertical line which pass through the center point of the square arrangement. On the other hand, the reception feed line feeds signals in the directions of second lines which pass through the center point of each patch and intersect with each first line at right angle. As a result, the mutual coupling between transmission and reception can be suppressed to a low level. In addition, when the transmission feed line is radiately connected from the center point of the square arrangement to each patch, the length thereof can be reduced, thereby decreasing the transmission loss.
REFERENCES:
patent: 4771291 (1988-09-01), Lo et al.
patent: 4937585 (1990-06-01), Shoemaker
patent: 4962383 (1990-10-01), Tresselt
patent: 5201065 (1993-04-01), Nichenke
Z. Rong-Hua, Microstrip CP Antenna For Dual Frequency Bands Operation, 1986 Int. Symp. Dig. Ant. & Prop., vol. II, IEEE, pp. 845-848.
Watkins et al., Experimental Investigation of Broad-Band Microstrip Antennas, IEEE 1990 Int. Radar Conf., Arlington Va., May 7-10, 1990, pp. 496-500.
Legay et al., Theoretical And Experimental Analysis of a Circ. Polarized Notched Antenna Fed Electromagnetically By One Microstrip Line, 1990 INt. symp. Dig., vol. II, IEEE, pp. 644-647.
IEEE International Symposium on Antenna and Propagations--Society by E. Rammos and A. Roederer "Self Diplexing Circularly Polarised Antenna" (May 1990) pp. 803-806.
IEICE Transactions on Antenna and Propagations A. P86-60 "Microstrip Array Antenna for Aeronautical Satellite Communications" by T. Shiokawa et al., (Aug. 1986) pp. 23-27.
Iwasaki Hisao
Sawada Hisashi
Brown Peter Toby
Hille Rolf
Kabushiki Kaisha Toshiba
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