Title:
TRANSPONDER WITH SELECTIVE ANTENNA BEAM USING DISTRIBUTED ANTENNA FEEDING ELEMENT
Document Type and Number:
Japanese Patent JPH033430
Kind Code:
A
Abstract:
PURPOSE: To minimize the number of components and to provide a light-weight inexpensive transponder by respectively generating inclusive and point beams by all the sets of antenna elements or the selected sub-set of the antenna elements. CONSTITUTION: In the case of the inclusive beam, the entire power is supplied through a first band-pass filter 14 along a first passage. Energy is connected to all the elements of the set 26 of the antenna elements by an input coupler 20. When the point beam is desired, a variable power divider 13 is arranged so as to connect a predetermined power part supplied through a phase shift device 15 and a second band-pass filter 16 to the second port of an output coupler 20 along a second passage. Thus, the power is connected only to the sub-set 25 of the antenna elements and the point beam is emitted from them. Thus, without adding the antenna elements or duplexing a multiplexer, this transponder for selectively supplying both of inclusive and point beam cover ranges is obtained.
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Inventors:
KAARU JIEI HAAN ZA SAADO
AANORUDO ERU BAAMAN
AANORUDO ERU BAAMAN
Application Number:
JP11532190A
Publication Date:
January 09, 1991
Filing Date:
May 02, 1990
Export Citation:
Assignee:
HUGHES AIRCRAFT CO
International Classes:
H01Q3/24; H04B7/185; H04B7/204; (IPC1-7): H01Q3/24; H04B7/185
Domestic Patent References:
| JPS5550707A | 1980-04-12 |
Attorney, Agent or Firm:
Takehiko Suzue (3 outside)
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