Title:
マイクロ波帯無線受信装置およびマイクロ波帯無線通信システム
Document Type and Number:
Japanese Patent JP3996902
Kind Code:
B2
Abstract:
An input modulation signal wave 108 a is frequency-upconverted to an intermediate frequency signal wave by a frequency mixer 3 . By adding a reference signal wave to the intermediate frequency signal wave frequency-upconverted by the frequency mixer 3 by means of a signal combiner 5 a, an intermediate frequency multiplex signal wave 7 is generated. The intermediate frequency multiplex signal wave 7 is frequency-upconverted to a milliwave by a second frequency mixer 8 . The multiplex signal wave in the milliwave band frequency-upconverted by the second frequency mixer 8 is amplified by a transmission amplifier 10 and transmitted as a radio multiplex signal wave 115 constituted of a radio reference signal wave 106 and a radio signal wave 107 from a transmission antenna 15. With this arrangement, there are provided a microwave band radio transmitter, a microwave band radio receiver and a microwave band radio communication system, which are excellent in controllability of a signal level of a transmission output and able to extend a radio transmission band and a radio transmission distance.
Inventors:
Eiji Suematsu
John Twinham
John Twinham
Application Number:
JP2003572189A
Publication Date:
October 24, 2007
Filing Date:
February 25, 2003
Export Citation:
Assignee:
Sharp Corporation
International Classes:
H04B1/04; H04B1/26; H04B1/28; H04B1/40
Domestic Patent References:
| JP2001053640A | ||||
| JP2000196484A | ||||
| JP5048491A | ||||
| JP2000183764A | ||||
| JP10303650A | ||||
| JP11504193A | ||||
| JP61131636A | ||||
| JP2055428A | ||||
| JP2002246921A |
Attorney, Agent or Firm:
Hiroshi Yamazaki
Mitsuo Tanaka
Yukinori Nakakura
Mitsuo Tanaka
Yukinori Nakakura