Title:
ELECTRONIC SCANNING ANTENNA
Document Type and Number:
Japanese Patent JP2959220
Kind Code:
B2
Abstract:
PURPOSE: To improve the azimuth precision of an electronic scanning antenna in a wide wave angle and suppress its gain reduction.
CONSTITUTION: An electronic scanning antenna is provided with a transmitting/ receiving part 4, a plurality of column arrays 11-124 which are arranged in a cylindrical manner and achieve beam scanning on the basis of the power to be inputted, and a control means 5 to control the beam scanning. In addition, the electronic scanning antenna has a power distributing means 3 which includes a power distributor 26 to distribute the power outputted by the transmitting/ receiving part and phase shifters 251-258 to achieve phase adjustment of the power of the distributor on the basis of the control of control means, a switching means 2 to provide the output of the power distributing means by selecting the column arrays on the basis of the control of the control means, and a processing means 6 to extract the altitude information or the wave angle information of the target. The control means 5 controls the phase shifter so that the phase of the transmitting or the receiving radio waves may be set to the specified wave angle in the planes normal to each other according to the wave angle of the target.
More Like This:
Inventors:
YAMAZAKI TSUGIO
Application Number:
JP20616391A
Publication Date:
October 06, 1999
Filing Date:
July 24, 1991
Export Citation:
Assignee:
NIPPON DENKI KK
International Classes:
G01S7/02; G01S7/28; H01Q3/26; H01Q21/20; (IPC1-7): G01S7/02; G01S7/28; H01Q3/26
Domestic Patent References:
| JP2253181A | ||||
| JP62126375A | ||||
| JP62126374A | ||||
| JP4111502A | ||||
| JP427205Y2 |
Attorney, Agent or Firm:
Suzuki Akio
Previous Patent: SECTION CONTOUR MEASURING DEVICE OF SHEET-SHAPED OBJECT
Next Patent: MANUFACTURE OF GLUCOSE SENSOR
Next Patent: MANUFACTURE OF GLUCOSE SENSOR