JPS5579540A - Fsk radio unit - Google Patents
Fsk radio unitInfo
- Publication number
- JPS5579540A JPS5579540A JP15445678A JP15445678A JPS5579540A JP S5579540 A JPS5579540 A JP S5579540A JP 15445678 A JP15445678 A JP 15445678A JP 15445678 A JP15445678 A JP 15445678A JP S5579540 A JPS5579540 A JP S5579540A
- Authority
- JP
- Japan
- Prior art keywords
- output
- frequency
- modulator
- circulator
- local oscillator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Transceivers (AREA)
- Bidirectional Digital Transmission (AREA)
Abstract
PURPOSE: To simplify a radio unit with a receiving local oscillator omitted by applying part of the output of a microwave-band or milliwave-band FM modulator, extracted by a power distributor, to a frequency converter as a substitute for a receiving local oscillator.
CONSTITUTION: A transmission part and reception part, selected so that a difference between a transmission frequency and reception frequency will be an intermediate frequency, are both provided so as to constitute a FSK radio unit. The output of FM modulator 22 of this transimssion part is applied via transmitting filter 23 to power distributor 24, whose output is partially applied to circulator 28 as a substitute for the output of the receiving local oscillator. The output of distributor 24 is applied to transmitting-receiving antenna 26 via circulator 25 to emit a radio wave; and the radio wave received by antenna 26 is applied to circulator 28 and then transmitted and received waves are converted into IF signals by frequency converter 29. Frequency discriminator 32 discriminates frequencies of those IF signals and the sum of the output of discriminator 32 and the input signal of modulator 22 or their difference is calculated by adder 33 to remove an input signal component included in the discrimination output.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15445678A JPS5579540A (en) | 1978-12-13 | 1978-12-13 | Fsk radio unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15445678A JPS5579540A (en) | 1978-12-13 | 1978-12-13 | Fsk radio unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5579540A true JPS5579540A (en) | 1980-06-16 |
Family
ID=15584616
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15445678A Pending JPS5579540A (en) | 1978-12-13 | 1978-12-13 | Fsk radio unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5579540A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5773544A (en) * | 1980-08-26 | 1982-05-08 | Int Standard Electric Corp | Digital single channel double transmission system transceiver |
JPS6046622A (en) * | 1983-08-24 | 1985-03-13 | Toyo Commun Equip Co Ltd | Simultaneous transmitting/receiving communication system using local oscillator of receiver also as channel oscillator of transmitter |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS502809A (en) * | 1973-03-02 | 1975-01-13 |
-
1978
- 1978-12-13 JP JP15445678A patent/JPS5579540A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS502809A (en) * | 1973-03-02 | 1975-01-13 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5773544A (en) * | 1980-08-26 | 1982-05-08 | Int Standard Electric Corp | Digital single channel double transmission system transceiver |
JPS6046622A (en) * | 1983-08-24 | 1985-03-13 | Toyo Commun Equip Co Ltd | Simultaneous transmitting/receiving communication system using local oscillator of receiver also as channel oscillator of transmitter |
JPH031851B2 (en) * | 1983-08-24 | 1991-01-11 | Toyo Communication Equip |
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