JPS614330A - Radio equipment - Google Patents
Radio equipmentInfo
- Publication number
- JPS614330A JPS614330A JP59126124A JP12612484A JPS614330A JP S614330 A JPS614330 A JP S614330A JP 59126124 A JP59126124 A JP 59126124A JP 12612484 A JP12612484 A JP 12612484A JP S614330 A JPS614330 A JP S614330A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- signal
- reception
- modulator
- transmission
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/50—Circuits using different frequencies for the two directions of communication
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transceivers (AREA)
Abstract
Description
【発明の詳細な説明】
（技術分野）
この発明は周波数安定度の良い受信信号を使用して周波
数安定度の高い送信信号を発生する無線機に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a radio device that generates a transmit signal with high frequency stability using a received signal with high frequency stability.
（従来技術）
一般に１搬送波を変調することによって情報の伝送が行
なわれているが、この搬送波は他の通信に妨害を与えな
いようにするため周波数安定度の高いものであることが
要求される。このため、従来は送信機で搬送波を発生す
る際に用いる発振器を周波数安定度の高いものとしてい
た。しかし、周波数安定度の高い発振器は高価であるた
め、簡易型の無線機に用いるのは経済的ではなかった。(Prior art) Generally, information is transmitted by modulating one carrier wave, but this carrier wave is required to have high frequency stability so as not to interfere with other communications. . For this reason, conventionally, the oscillator used when generating a carrier wave in a transmitter has been made to have a high frequency stability. However, since oscillators with high frequency stability are expensive, it is not economical to use them in simple radio equipment.
（発明の目的）
この発明の目的は、このような問題を解決し、安価に高
安定の送信信号を発生できる無線機を提供することにあ
る。(Object of the Invention) An object of the present invention is to solve such problems and provide a radio device that can generate highly stable transmission signals at low cost.
（発明の構成）
この発明の構成は、送信と受信とを時間をずらして行う
半２重通信方式の無線機において、送信部には、入力端
子に供給される信号に応じて周波数が制御される信号を
発生する変調器と、この変調器からの送信出力をＯＮ
、ＯＦＦするスイッチ手段とを備え、受信部には、前記
変調器の出力の一部と周波数安定度の良い受信信号とを
結合する結合器と、前記変調出力と前記受信信号とを周
波数混合する受信ミキサと、この受信ミキサの出力であ
る中間周波信号を周波数弁別する復調器と、この復調器
の直流出力を増幅して前記変調器に帰還する手段とを備
え、前記受信信号と前記変調器の出力周波数との周波数
差を一定にすることにより、送信周波数全安定化する事
を特徴とする。(Structure of the Invention) The structure of the invention is that in a half-duplex communication radio device that performs transmission and reception at different times, the transmitter has a frequency controlled according to a signal supplied to an input terminal. Turn on the modulator that generates the signal and the transmission output from this modulator.
, a switch means for turning OFF, and the receiving section includes a combiner for combining a part of the output of the modulator and a received signal with good frequency stability, and a combiner for frequency-mixing the modulated output and the received signal. A receiving mixer, a demodulator for frequency-discriminating an intermediate frequency signal output from the receiving mixer, and means for amplifying the DC output of the demodulator and feeding it back to the modulator, By keeping the frequency difference with the output frequency constant, the transmission frequency is completely stabilized.
（実施例） 次に図面により本発明の詳細な説明する。(Example) Next, the present invention will be explained in detail with reference to the drawings.
第１図はこの発明の一実施例を表わすブロック図である
。無線機の送信入力端子１から入った送−信＜ −２Ａ
７ ）” ＠よ、。。無線機力、。□５間だけＯＮ
（通過）となるスイッチ２，５とその時間だけＯＦＦ
（断）となるスイッチ１４のうちスイッチ２を通りＦＭ
変調器３により変調され方向性結合器４．スイッチ５．
送信共用器６を通ってアンテナ７から送信される。FIG. 1 is a block diagram showing one embodiment of the present invention. Transmission received from transmitter input terminal 1 of the radio < -2A
7)” @Yo... Radio power. □ ON for 5 hours only
(pass) switches 2 and 5 and turn off for that time
(off) through switch 2 of switch 14.
The modulator 3 modulates the directional coupler 4. Switch 5.
The signal is transmitted from the antenna 7 through the transmission duplexer 6 .
一方、アンテナ７より受信された信号は、送受共用器６
．受信帯域通過ろ波器８．一方向性結合器９を経て受信
ミキサ１０に供給される。ここで送信例のスイッチ２，
５がＯＦＦとなる時間には、ＦＭ変調器３は単一正弦波
を発生し、方向性結合器４．９を通って受信ミキ＋ｊ１
０に供給されて受信ローカルとして作用する。このロー
カル信号と受信信号との差周波数、すなわち中間周波信
号をＦＭ復調器１１にて復調してベースバンドスイッチ
１４を通過させ、ベースバッド出力端子１５から出力す
る。また、ＦＭ復調器１１の直流出力をとり出し、低域
通過ｐ波器１２．増幅器１３を通した後、ＦＭ変調器３
に帰還し受信追随ＡＦＣループを形成する。このように
本発明の無線機轄、送信する時間には受信信号を捨て去
り（又は受信信号は自局向でないとし）、送信信号を送
出しない時間においては送信波を受信ローカルとして使
用する、いわゆる半二中通信方式の無線機であり、また
受信周波数を基準として受信追随ＡＦＣをかける事によ
って送信周波数を安定化することができる。On the other hand, the signal received from the antenna 7 is transmitted to the duplexer 6
．． Receive bandpass filter8. The signal is supplied to a reception mixer 10 via a unidirectional coupler 9 . Here, switch 2 in the transmission example,
5 is OFF, the FM modulator 3 generates a single sine wave, which passes through the directional coupler 4.9 to the receiving mixer +j1.
0 and acts as a receive local. The difference frequency between this local signal and the received signal, that is, the intermediate frequency signal, is demodulated by the FM demodulator 11, passed through the baseband switch 14, and outputted from the baseband output terminal 15. Also, the DC output of the FM demodulator 11 is taken out, and the low-pass p-wave unit 12. After passing through the amplifier 13, the FM modulator 3
and forms a reception tracking AFC loop. In this way, the wireless device of the present invention discards the received signal (or assumes that the received signal is not directed to its own station) when it is transmitting, and uses the transmitted wave as a local receiving signal during the time when it does not transmit a transmitted signal. This is a two-way communication type radio, and the transmission frequency can be stabilized by applying reception tracking AFC using the reception frequency as a reference.
（発明の効果）
以上説明したように、本発明によれば、高安定な受信周
波数を基準として送信周波数を安定化できるので、安価
な無線機を得ることができる。(Effects of the Invention) As described above, according to the present invention, it is possible to stabilize the transmission frequency using a highly stable reception frequency as a reference, and therefore it is possible to obtain an inexpensive radio device.
第１図はこの発明の一実施例を示すブロック図である。
図において
１．１５・・・・・・ベースバ／ド入出力端子、２．１
４・・・・・・ベースバンドスイッチ、３・・・・・・
ＦＭｉＦ器、４．９・・・・・・方向性結合器、５・・
・・・・高周波スイッチ、６・・・・・・送受共用器、
７・・・・・・アンテナ、８・・・・・・受信帯域通過
Ｆ波器、１０・・・・・・受信ミキサ、１１・・・・・
・ＦＭ復調器、１２・・・・・・低域通過Ｆ波器、１３
・・・・・・直流増幅器、
である。FIG. 1 is a block diagram showing one embodiment of the present invention. In the figure, 1.15...Base bar/board input/output terminal, 2.1
4...Baseband switch, 3...
FMiF unit, 4.9... Directional coupler, 5...
...High frequency switch, 6...Transmitter/receiver duplexer,
7...Antenna, 8...Receiving bandpass F wave device, 10...Receiving mixer, 11...
・FM demodulator, 12...Low pass F wave unit, 13
・・・・・・DC amplifier.
Claims (1)
無線機において、送信部には、入力端子に供給される信
号に応じて周波数が制御される信号を発生する変調器と
、この変調器からの送信出力をＯＮ、ＯＦＦするスイッ
チ手段とを備え、受信部には、前記変調器の出力の一部
と周波数安定度の良い受信信号とを結合する結合器と、
前記変調出力と前記受信信号とを周波数混合する受信ミ
キサと、この受信ミキサの出力の中間周波信号を周波数
弁別する復調器と、この復調器の直流出力を増幅して前
記変調器に帰還する手段とを備え、前記受信周波数と前
記変調器の出力周波数との周波数差を一定にすることに
より、送信周波数を安定化した事を特徴とする無線機。In a half-duplex communication radio device that performs transmission and reception with time shifts, the transmitting section includes a modulator that generates a signal whose frequency is controlled according to the signal supplied to the input terminal, and a modulator that generates a signal whose frequency is controlled according to the signal supplied to the input terminal. a switch means for turning on and off the transmission output from the modulator;
A receiving mixer for frequency mixing the modulated output and the received signal, a demodulator for frequency discriminating the intermediate frequency signal output from the receiving mixer, and means for amplifying the DC output of the demodulator and feeding it back to the modulator. A radio device comprising: a transmitting frequency stabilized by making constant a frequency difference between the receiving frequency and the output frequency of the modulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59126124A JPS614330A (en) | 1984-06-19 | 1984-06-19 | Radio equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59126124A JPS614330A (en) | 1984-06-19 | 1984-06-19 | Radio equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS614330A true JPS614330A (en) | 1986-01-10 |
Family
ID=14927245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59126124A Pending JPS614330A (en) | 1984-06-19 | 1984-06-19 | Radio equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS614330A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999026349A1 (en) * | 1997-11-18 | 1999-05-27 | Aiwa Co., Ltd. | Signal generating circuit, and transmitter, receiver and transmitting and receiving device using the circuit |
-
1984
- 1984-06-19 JP JP59126124A patent/JPS614330A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999026349A1 (en) * | 1997-11-18 | 1999-05-27 | Aiwa Co., Ltd. | Signal generating circuit, and transmitter, receiver and transmitting and receiving device using the circuit |
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