Title:
COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/1999/000910
Kind Code:
A1
Abstract:
Inexpensive dual-band-ready FDD/TDMA communication device having a small size and light weight. The communication device is provided with a received signal change-over switch (2), a reception mixer (3), a demodulator (4), a high-frequency variable frequency oscillator (5), IF oscillators (8 and 9), an IF signal change-over switch (7), a transmission system mixer (6), a quadrature modulator (10), and a signal-to-be-transmitted change-over switch (11). The frequencies of the variable frequency oscillator (5) and the IF oscillators (8 and 9) are determined appropriately by setting the intermediate frequency for reception at about half the difference between two receiving bands.
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Inventors:
KINOUCHI SHINICHI (JP)
KANAYAMA YUICHI (JP)
MIKOSHIBA NORIHIKO (JP)
KANAYAMA YUICHI (JP)
MIKOSHIBA NORIHIKO (JP)
Application Number:
PCT/JP1998/002892
Publication Date:
January 07, 1999
Filing Date:
June 26, 1998
Export Citation:
Assignee:
ASAHI CHEMICAL IND (JP)
ASAHI CHEMICAL MICRO SYST (JP)
KINOUCHI SHINICHI (JP)
KANAYAMA YUICHI (JP)
MIKOSHIBA NORIHIKO (JP)
ASAHI CHEMICAL MICRO SYST (JP)
KINOUCHI SHINICHI (JP)
KANAYAMA YUICHI (JP)
MIKOSHIBA NORIHIKO (JP)
International Classes:
H04B1/40; H04B1/50; (IPC1-7): H04B1/50
Foreign References:
| JPH06132847A | 1994-05-13 | |||
| JPH07307655A | 1995-11-21 | |||
| JPH05206917A | 1993-08-13 |
Attorney, Agent or Firm:
Tani, Yoshikazu (Akasaka 2-chome Minato-ku, Tokyo, JP)
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