JPH0671217B2 - Wireless device - Google Patents
Wireless deviceInfo
- Publication number
- JPH0671217B2 JPH0671217B2 JP61188113A JP18811386A JPH0671217B2 JP H0671217 B2 JPH0671217 B2 JP H0671217B2 JP 61188113 A JP61188113 A JP 61188113A JP 18811386 A JP18811386 A JP 18811386A JP H0671217 B2 JPH0671217 B2 JP H0671217B2
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- Japan
- Prior art keywords
- frequency
- transmission
- signal
- reception
- carrier
- Prior art date
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Description
【発明の詳細な説明】 〔概要〕 搬送波を発振すると同時に変調信号により周波数変調さ
れるFM変調発振器に、その出力の搬送波周波数ｆを基準
周波数f0により周波数識別しその誤差電圧で前記FM変調
発振器の発振周波数ｆを制御して規定の送信周波数FTと
するAFC回路を付した送信部と、その規定送信周波数FT
と一定関係にある受信周波数fRを一定中間周波数に変換
して受信するヘテロダイン型の受信部と、前記送信部の
出力信号と受信部の入力信号がサーキュレータを介して
１つの空中線系を共用する共用回路からなる無線装置に
おいて、該共用回路のサーキュレータの内部で送信部出
力が受信部入力へ漏洩する周波数ｆの搬送波を受信部に
入力し、受信部の局部発振周波数FLOCにより中間周波数
f IF2に周波数変換し、その中間周波数f IF2の信号を中
間周波数の周波数識別器で識別するようにしてAFC動作
の基準周波数となる識別回路の中心周波数の安定度を向
上し、結果として送信出力の搬送波の周波数ｆの周波数
偏差を許容偏差内に安定に保持せんとするもの。DETAILED DESCRIPTION OF THE INVENTION [Outline] In an FM modulation oscillator that oscillates a carrier wave and is frequency-modulated by a modulation signal, a carrier frequency f of its output is frequency-identified by a reference frequency f 0 , and the FM modulation oscillator is determined by its error voltage. With the AFC circuit that controls the oscillation frequency f of the specified transmission frequency FT and the specified transmission frequency FT
And a heterodyne type receiving unit that receives a reception frequency fR that has a constant relationship with a constant intermediate frequency, and an output signal of the transmitting unit and an input signal of the receiving unit share one antenna system via a circulator In a wireless device including a circuit, a carrier having a frequency f at which a transmitter output leaks to a receiver input is input to a receiver inside a circulator of the shared circuit, and an intermediate frequency is generated by a local oscillation frequency FLOC of the receiver.
The frequency conversion to fIF2 is performed, and the signal of the intermediate frequency fIF2 is identified by the frequency discriminator of the intermediate frequency to improve the stability of the center frequency of the identification circuit that is the reference frequency of AFC operation, and as a result, the transmission output The frequency deviation of the frequency f of the carrier wave is to be stably maintained within the allowable deviation.
本発明は送信部Ｔと、受信部Ｒと、１つの空中線系Ａを
送信信号と受信信号が共用する共用回路部T/Rとからな
る無線装置に関するもので、特に送信部Ｔに付設されて
送信出力の搬送波周波数ｆを規定の送信周波数FTに制御
する自動周波数制御回路（AFC）の周波数識別の基準と
なる基準周波数f0の安定度を向上して、送信周波数ｆの
確度が、周囲温度など周囲環境の変化に対して許容偏差
内に安定に保持されることが望まれている。The present invention relates to a wireless device including a transmission unit T, a reception unit R, and a shared circuit unit T / R in which one antenna system A is shared by a transmission signal and a reception signal, and is particularly attached to the transmission unit T. The stability of the reference frequency f0, which is the reference for frequency identification of the automatic frequency control circuit (AFC) that controls the carrier frequency f of the transmission output to the specified transmission frequency FT, is improved so that the accuracy of the transmission frequency f is It is desired to be stably maintained within the allowable deviation with respect to changes in the surrounding environment.
本発明に関する無線装置の従来の回路構成を第５図に示
す。FIG. 5 shows a conventional circuit configuration of a wireless device according to the present invention.
無線装置の送信部Ｔは、図に示すごとく、周波数ｆの高
いGHz帯の搬送波を直接発振すると同時に数MHz以下の低
い周波数の変調信号により周波数変調されるFM変調発振
器１が主体となり、これにFM変調発振器の出力のFM変調
信号の搬送波周波数ｆを、送信部Ｔの規定送信周波数FT
になるように制御する自動周波数制御回路（AFC）２を
付設した構成のものである。受信部Ｒは、送信周波数FT
と一定周波数関係にある受信周波数fRを受信するのに、
一定の中間周波数fIF 1の信号に変換して受信する所謂
ヘテロダイン型の回路構成のものである。また、この無
線装置は、１つの空中線系Ａを送信部Ｔの送信信号と受
信部Ｒの受信信号が共用できるように、送信信号と受信
信号の伝送方向の伝送損失量を定めるサーキュレータ41
をもつ共用回路T/Rを有し、送信部Ｔから空中線系Ａの
方向に向かう送信周波数ｆの送信信号、および空中線系
Ａから受信部Ｒの方向に向かう受信周波数fRの受信信号
に対しては伝送損失が少ないように構成されている。本
発明に関する無線装置の送信部Ｔの本体部がGHz帯の高
い周波数ｆの搬送波を自己発振し同時に周波数変調され
るFM変調発振器であるだけに、該搬送周波数ｆを規定周
波数FTに対して許容偏差内に保つには、該FM変調発振器
の発振周波数ｆを規定送信周波数FTに制御するAFC回路
の基準周波数f0が、周囲温度など周囲環境の変化に対し
て変動せず安定であることが必要である。As shown in the figure, the transmitter T of the wireless device is mainly composed of an FM modulation oscillator 1 which directly oscillates a carrier wave in a GHz band having a high frequency f and at the same time is frequency-modulated by a modulation signal having a low frequency of several MHz or less. The carrier frequency f of the FM modulation signal output from the FM modulation oscillator is defined as the specified transmission frequency FT of the transmitter T.
The automatic frequency control circuit (AFC) 2 for controlling so as to be attached is attached. The receiving unit R has a transmission frequency FT
To receive the reception frequency fR that has a constant frequency relationship with
It has a so-called heterodyne type circuit configuration in which a signal having a constant intermediate frequency fIF 1 is converted and received. Further, this wireless device determines the amount of transmission loss in the transmission direction of the transmission signal and the reception signal so that one antenna system A can share the transmission signal of the transmission unit T and the reception signal of the reception unit R.
For a transmission signal of a transmission frequency f from the transmission section T toward the antenna system A and a reception signal of a reception frequency fR from the antenna system A toward the reception section R. Is configured to have low transmission loss. Since the main body of the transmitter T of the wireless device according to the present invention is an FM modulation oscillator that self-oscillates a carrier wave of a high frequency f in the GHz band and is frequency-modulated at the same time, the carrier frequency f is allowed with respect to the specified frequency FT. In order to keep it within the deviation, the reference frequency f 0 of the AFC circuit that controls the oscillation frequency f of the FM modulation oscillator to the specified transmission frequency FT is stable and does not fluctuate with changes in the ambient environment such as ambient temperature. is necessary.
従来の無線装置は送信部Ｔの本体部は、前記のFM変調発
振器１と、そのFM変調発振器の出力の一部を自動周波数
制御回路AFC2へ分岐する方向性結合器1aからなる。In the conventional wireless device, the main body of the transmitter T is composed of the FM modulation oscillator 1 and a directional coupler 1a for branching a part of the output of the FM modulation oscillator to the automatic frequency control circuit AFC2.
自動周波数制御回路AFC2は、方向性結合器1aからの送信
出力Pfが分岐された一部分を入力して、その送信周波数
ｆの搬送波信号を、予め送信周波数として規定された規
定送信周波数FTを基準周波数f0とする識別回路によって
周波数識別する周波数識別器23と、その出力の誤差電圧
Bcを増幅してFM変調発振器１の変調入力端に戻す直流増
幅器23aからなる。The automatic frequency control circuit AFC2 inputs a part where the transmission output Pf from the directional coupler 1a is branched, and uses a carrier signal of the transmission frequency f as a reference frequency based on a specified transmission frequency FT which is defined as a transmission frequency in advance. The frequency discriminator 23 that discriminates the frequency by the discrimination circuit with f 0 and the error voltage of its output
It comprises a DC amplifier 23a for amplifying Bc and returning it to the modulation input terminal of the FM modulation oscillator 1.
自動周波数制御回路AFC2について更に述べると、周波数
識別器23は、その入力Ptの搬送周波数ｆを識別する基準
周波数f0が送信部の規定送信周波数FTに設定されてい
る。To further describe the automatic frequency control circuit AFC2, in the frequency discriminator 23, the reference frequency f 0 for discriminating the carrier frequency f of the input Pt is set to the prescribed transmission frequency FT of the transmission section.
規定送信周波数FTは上述のごとく、GHz帯の高い周波数
なので、周波数識別器23の基準周波数f0も同じGHz帯の
高い周波数となり、その基準周波数f0を決定する識別回
路（RF/DISCR）の回路長は波長に比較して機械的に短く
なる。Since the specified transmission frequency FT is a high frequency in the GHz band as described above, the reference frequency f 0 of the frequency discriminator 23 is also the same high frequency in the GHz band, and the discrimination circuit (RF / DISCR) that determines the reference frequency f 0 is The circuit length is mechanically shorter than the wavelength.
受信部R3は、相手送信機からの所定の受信周波数fRの信
号を一定の中間周波数f IF1（一般には70MHz）の信号に
周波数変換する周波数変換器32と、周波数変換器32に供
給する周波数f LOCの局部搬送波を発振する局部発振器3
1と、周波数変換器32の出力段で前記中間周波数f IF1の
変換信号を選別する中間周波数フィルタIF1 33から成
る。The reception unit R3 includes a frequency converter 32 that converts a signal of a predetermined reception frequency fR from a partner transmitter into a signal of a constant intermediate frequency f IF1 (generally 70 MHz), and a frequency f that is supplied to the frequency converter 32. Local oscillator 3 that oscillates the local carrier wave of LOC
1 and an intermediate frequency filter IF1 33 for selecting the converted signal of the intermediate frequency f IF1 at the output stage of the frequency converter 32.
共用回路T/R4は、規定の送信周波数FTの送信信号を通す
送信帯域通過フィルタTBF 42と、受信周波数fRの受信信
号に通す受信帯域通過RBF 3と、送信信号と受信信号に
方向性を与えるサーキュレータ41から成る。The shared circuit T / R 4 provides a transmission band pass filter TBF 42 that passes a transmission signal of a specified transmission frequency FT, a reception band pass RBF 3 that passes a reception signal of a reception frequency fR, and directivity to the transmission signal and the reception signal. It consists of a circulator 41.
サーキュレータ41は、送信周波数ｆの送信信号を空中綿
系Ａの方向へ低損失で伝送し、受信周波数fRの受信信号
を空中線系Ａから受信部Ｒの方向へも低損失で伝送する
が、その逆方向の伝送、および送信周波数ｆの送信信号
の受信帯域フィルタRBF 43の入力方向への伝送は伝送損
失が大きい。次に、簡単に総合動作を述べると、 送信部ＴのFM変調発振器１は、GHz帯の高い搬送周波数
ｆを直接発振すると同時に外部から入力される周波数の
低い変調信号で周波数変調（FM）されるが、その出力の
FM変調信号Pfの搬送周波数ｆの安定度は自己発振でFM変
調をかけるため比較的低い。The circulator 41 transmits a transmission signal of the transmission frequency f in the direction of the airborne system A with low loss, and transmits a reception signal of the reception frequency fR from the antenna system A to the direction of the receiving unit R with low loss. Transmission loss in the reverse direction and in the input direction of the reception band filter RBF 43 of the transmission signal of the transmission frequency f is large. Next, the overall operation will be briefly described. The FM modulation oscillator 1 of the transmitter T directly oscillates a high carrier frequency f in the GHz band and at the same time is frequency-modulated (FM) with a low-frequency modulation signal input from the outside. But its output
The stability of the carrier frequency f of the FM modulation signal Pf is relatively low because FM modulation is performed by self-oscillation.
FM変調発振器１の出力Pfの一部は方向性結合器1aにより
分岐され、自動周波数制御回路AFC 2の周波数識別器23
に入力されその識別回路（RF/DISCR）で周波数識別され
る。A part of the output Pf of the FM modulation oscillator 1 is branched by the directional coupler 1a, and the frequency discriminator 23 of the automatic frequency control circuit AFC 2 is used.
The frequency is identified by the identification circuit (RF / DISCR).
この識別回路（RF/DISCR）の動作は、第３図の周波数偏
差−誤差電圧の特性図に示すごとく、入力信号の周波数
ｆが中心の基準周波数f0から外れると、その周波数偏差
の大きさに比例し、その極性に応じた誤差電圧Ecを出力
する。As shown in the frequency deviation-error voltage characteristic diagram of FIG. 3, the operation of this discrimination circuit (RF / DISCR) is such that when the frequency f of the input signal deviates from the central reference frequency f 0 , the magnitude of the frequency deviation The error voltage Ec is output in proportion to the polarity.
周波数識別器23から出力された誤差電圧Ecは直流増幅器
23aで増幅され、FM変調発振器１の変調入力端に加えら
れる。The error voltage Ec output from the frequency discriminator 23 is a DC amplifier.
The signal is amplified by 23a and added to the modulation input terminal of the FM modulation oscillator 1.
変調入力端に加えられた誤差電圧Bcは、FM変調発振器１
の内部のバラクタなど周波数可変素子を動作させてその
発振搬送波の周波数ｆが規定送信周波数FTになるように
ループ制御する。The error voltage Bc applied to the modulation input terminal is the FM modulation oscillator 1
A frequency variable element such as an internal varactor is operated to perform loop control so that the frequency f of the oscillation carrier becomes the specified transmission frequency FT.
自動周波数制御回路AFC 2によって規定送信周波数FTに
なるように制御される周波数ｆの送信出力Pfは、共用回
路T/R4に入力され、その送信帯域通過フィルタTBF 42を
通り、サーキュレータ41に入力される。The transmission output Pf of the frequency f controlled by the automatic frequency control circuit AFC 2 so as to become the specified transmission frequency FT is input to the shared circuit T / R 4, passes through the transmission band pass filter TBF 42 thereof, and is input to the circulator 41. It
サーキュレータ41は入力した送信出力Pfを矢印の方向に
低損失で伝送して、その大部分が空中線系Ａの方向へ導
かれる。The circulator 41 transmits the input transmission output Pf in the direction of the arrow with low loss, and most of it is guided in the direction of the antenna system A.
この周波数ｆの送信出力Pfは一般に大電力（数ワット）
なので、その一部分はサーキュレータ41の内部で受信帯
域通過フィルタRBF 43の入力方向へも漏洩出力するが、
そのレベルは低く、かつ該帯域通過フィルタ43によりカ
ットされて受信部Ｒへは到達しない。The transmission output Pf of this frequency f is generally high power (several watts)
So, a part of it leaks out into the input direction of the reception band pass filter RBF 43 inside the circulator 41,
The level is low, and it is cut by the band pass filter 43 and does not reach the receiving unit R.
また、サーキュレータ41は、空中線系Ａからの受信周波
数fRの受信信号を受信帯域通過フィルタRBF 43の方向へ
低損失で伝送し、受信帯域フィルタRBF 43は、この周波
数fRの受信信号を低損失で通過させて受信部R3へ入力す
る。Further, the circulator 41 transmits the reception signal of the reception frequency fR from the antenna system A to the reception band pass filter RBF 43 with low loss, and the reception band filter RBF 43 transmits the reception signal of this frequency fR with low loss. It is passed and input to the receiver R3.
受信部R3は、入力された受信信号の周波数fRを周波数変
換器32において局部発振器31の局部搬送波の規定周波数
FLOCと混合して、周波数fRと周波数FLOCとの差の一定周
波数の第１中間周波数fIF 1の信号を発生させる。The receiver R3 uses the frequency fR of the input received signal in the frequency converter 32 to determine the specified frequency of the local carrier wave of the local oscillator 31.
By mixing with FLOC, a signal of the first intermediate frequency fIF 1 having a constant frequency difference between the frequency fR and the frequency FLOC is generated.
周波数変換器32で周波数変換された第１中間周波数fIF1
の信号は、本来の受信出力として其の出力段の中間周波
フィルタIF1 33を介してFM復調部などの外部に出力され
る。The first intermediate frequency fIF1 frequency-converted by the frequency converter 32
The signal of is output as an original reception output to the outside of the FM demodulation unit or the like through the intermediate frequency filter IF133 of the output stage.
局部発振器31の局部搬送波の規定周波数FLOCは、受信周
波数fRを介して送信部Ｔの規定送信周波数FTと一定の周
波数関係にあるが、従来の無線装置では、この局部搬送
波の周波数FLOCは、送信部Ｔの送信周波数ｆの周波数制
御には無関係である。The specified frequency FLOC of the local carrier wave of the local oscillator 31 has a constant frequency relationship with the specified transmission frequency FT of the transmission unit T via the reception frequency fR. However, in the conventional wireless device, the frequency FLOC of the local carrier wave is It has nothing to do with the frequency control of the transmission frequency f of the section T.
従来の無線装置では、上述のごとく、送信部Ｔの送信出
力周波数ｆの確度（規定送信周波数FTからの絶対偏差）
は、自動周波数制御回路AFC 2の周波数識別器23の識別
回路（RF/DISCR）の基準周波数f0の安定度に依存する。In the conventional wireless device, as described above, the accuracy of the transmission output frequency f of the transmission unit T (absolute deviation from the specified transmission frequency FT)
Depends on the stability of the reference frequency f 0 of the discrimination circuit (RF / DISCR) of the frequency discriminator 23 of the automatic frequency control circuit AFC 2.
周波数識別器23の識別回路（RF/DISCR）の基準周波数f0
は、既に述べたごとく、GHz帯という高い周波数FTの値
に定められているので、識別回路全体は波長に比例して
小形にすることは出来るが、周波数識別特性を定める回
路長の機械寸法は短くなり、装置の周囲温度、振動など
使用環境の変化に対して変化し易く安定度が悪い。従っ
て送信部Ｔの出力のFM変調信号Pfの搬送波周波数ｆの確
度を許容偏差内に保つことが難しいという問題がある。Reference frequency f 0 of the discrimination circuit (RF / DISCR) of the frequency discriminator 23
As already mentioned, since it is set to a high frequency FT value in the GHz band, the entire discrimination circuit can be made small in proportion to the wavelength, but the mechanical dimension of the circuit length that determines the frequency discrimination characteristic is It becomes short, and it tends to change due to changes in the operating environment such as the ambient temperature and vibration of the device, and its stability is poor. Therefore, there is a problem that it is difficult to maintain the accuracy of the carrier frequency f of the FM modulated signal Pf output from the transmitter T within the allowable deviation.
この問題点は、自動周波数制御回路AFC 2の周波数識別
器の基準周波数f0をGHz帯という高い周波数に設定する
のではなく、比較的低い数百MHz帯という中間周波数で
構成することによって、回路の小形化の余地を保持した
まま、周囲環境に対して安定度を保持して解決される。This problem is that the reference frequency f 0 of the frequency discriminator of the automatic frequency control circuit AFC 2 is not set to a high frequency of GHz band, but is configured to a relatively low intermediate frequency of several hundred MHz band. The solution is to maintain stability against the surrounding environment while maintaining room for downsizing.
そのため、従来は使用していなかった共用回路T/R4およ
び受信部R3のもつ諸特性を利用する。すなわち、 共用回路T/R4の特性としては、すでに説明したごとく、
サーキュレータ41の特性として入力の搬送波周波数ｆの
送信信号Pfの一部が低レベルではあるが、点線で示すご
とく受信帯域通過フィルタRBF 43の入力方向へ漏洩する
ことを利用して、第１図の原理ブロック図に示すごと
く、この周波数ｆの漏洩送信搬送波も通過できる受信帯
域通過フィルタRBF 44を構成して、この帯域通過フィル
タRBF 44を通して周波数ｆの漏洩送信搬送波を受信部R3
に導く。Therefore, the characteristics of the shared circuit T / R4 and the receiving unit R3, which have not been used conventionally, are used. That is, as the characteristics of the shared circuit T / R4, as already explained,
As a characteristic of the circulator 41, although a part of the transmission signal Pf of the input carrier frequency f is at a low level, as shown by the dotted line, the leakage in the input direction of the reception bandpass filter RBF 43 is utilized to make use of the characteristics shown in FIG. As shown in the principle block diagram, a reception bandpass filter RBF 44 that can also pass the leaky transmission carrier of the frequency f is constructed, and the leaky transmission carrier of the frequency f is passed through the bandpass filter RBF 44 to the receiving unit R3.
Lead to.
また、受信部R3の特性としては、局部発振器31の局部搬
送波の規定周波数FLOCが、送信部の規定送信周波数FTが
定まると相手局からの受信信号の周波数fRを介して一義
的に決まり、その規定周波数FLOCの局部搬送波が、受信
部Ｒの周波数変換器32にて何れの周波数の入力信号に対
しても、その周波数を一定周波数だけ離れた一定中間周
波数の信号に変換することを利用する。Further, as the characteristic of the receiving unit R3, the specified frequency FLOC of the local carrier of the local oscillator 31, when the specified transmission frequency FT of the transmitting unit is determined, is uniquely determined via the frequency fR of the reception signal from the partner station, It is used that the local carrier wave of the specified frequency FLOC converts the frequency of the input signal of any frequency in the frequency converter 32 of the receiving unit R into a signal of a constant intermediate frequency separated by a constant frequency.
すなわち、共用回路T/Rに、送信出力Pfの一部が受信部
Ｒへ漏洩する手段44を設け、その漏洩手段44である受信
帯域通過フィルタRBF 44から出力される漏洩送信搬送波
の周波数ｆを、受信部Ｒの周波数変換器32において局部
発振器31の周波数FLOCにより周波数変換して、周波数ｆ
と周波数FLOCとの差の第２中間周波数fIF 2の信号を取
り出すよう構成する。That is, the common circuit T / R is provided with a means 44 for leaking a part of the transmission output Pf to the receiving section R, and the frequency f of the leaky transmission carrier wave output from the reception bandpass filter RBF 44 which is the leakage means 44 is set. , The frequency converter 32 of the receiver R converts the frequency by the frequency FLOC of the local oscillator 31,
And a signal of the second intermediate frequency fIF 2 which is the difference between the frequency FLOC and the frequency FLOC.
このようにして得られた受信部Ｒの第２中間周波数fIF2
の信号を、送信部Ｔの自動周波数制御回路AFC 2の周波
数識別器21に入力して周波数識別する。The second intermediate frequency fIF2 of the receiving unit R thus obtained
Is input to the frequency discriminator 21 of the automatic frequency control circuit AFC 2 of the transmitter T to discriminate the frequency.
当然のこととして、周波数識別器21の周波数識別回路の
基準となる基準周波数f0は、送信部の規定送信周波数FT
と受信部の局部搬送波の規定周波数FLOCの差の規定差周
波数FIF 2に選定される。As a matter of course, the reference frequency f 0 used as the reference of the frequency identification circuit of the frequency discriminator 21 is the specified transmission frequency FT of the transmitter.
And the specified difference frequency FIF 2 of the difference between the specified frequency FLOC of the local carrier wave of the receiver and the receiver.
以上の技術思想を纒めると、本発明の構成は、周波数ｆ
の搬送波を発振すると同時に変調信号により周波数変調
されるFM変調発振器（１）と、該FM変調発振器（１）の
出力Pfの搬送周波数ｆを予め定められる基準周波数
（f0）により周波数識別周波数ｆを規定の送信周波数FT
に自動的に制御する自動周波数制御回路（２）からなる
送信部（Ｔ）と、前記規定の送信周波数FTと一定周波数
関係にある相手送信機からの受信周波数fRの受信信号を
一定の周波数差（fR-FLOC）の中間周波数の信号（fIF
1）に変換（32）する所定周波数FLOCの局部搬送波を発
生する局部発振器（31）をもつ受信部（Ｒ）と、前記搬
送部（Ｔ）の出力の搬送波周波数ｆの送信信号（Pf）と
相手送信機から受信して受信部（Ｒ）に向かう周波数fR
の受信信号に対しては低損失の伝送特性を与えるサーキ
ュレータ（41）によって１つの空中線系（Ａ）を共用す
る共用回路（T/R）からなる無線装置において、前記共
用回路（T/R）に、送信部（Ｔ）の出力の搬送波周波数
ｆの送信信号（Pf）の一部を該サーキュレータ（41）を
通し受信部（Ｒ）へ出力する漏洩手段（44）を設け、該
漏洩手段（44）により得られた周波数ｆの漏洩送信信号
を１受信入力として前記受信部（Ｒ）が局部発振器（3
1）の所定周波数FLOCの局部搬送波により周波数変換（3
2）し前記送信部（Ｔ）の送信周波数ｆよりも一定周波
数差（fR-FLOC）だけ低い周波数の第２の中間周波数（f
IF2）の信号を得て前記送信部（Ｔ）へ出力させ、該送
信部（Ｔ）の自動周波数制御回路（２）が、該受信部
（Ｒ）からの第２の中間周波数（fIF2）の信号の周波数
を、前記送信部（Ｔ）の規定の送信周波数FTと受信部
（Ｒ）の一定の局部搬送波周波数FLOCとの差として一義
的に定まる周波数（FIF2）を周波数識別（21）の基準周
波数（f0）として周波数識別するように構成される。In light of the above technical idea, the configuration of the present invention has a frequency f
The FM modulation oscillator (1) that oscillates the carrier wave of the above and is frequency-modulated by the modulation signal, and the carrier frequency f of the output Pf of the FM modulation oscillator (1) is determined by the frequency identification frequency f by the predetermined reference frequency (f 0 ). The specified transmission frequency FT
A transmission section (T) comprising an automatic frequency control circuit (2) for automatically controlling the reception frequency f R of a reception signal from a partner transmitter having a constant frequency relationship with the specified transmission frequency FT. intermediate frequency signal of the difference (f R -FLOC) (fIF
A receiver (R) having a local oscillator (31) for generating a local carrier of a predetermined frequency FLOC to be converted (32) into 1), and a transmission signal (Pf) of a carrier frequency f output from the carrier (T). Frequency f R received from the partner transmitter and going to the receiver (R)
In a wireless device including a shared circuit (T / R) that shares one antenna system (A) with a circulator (41) that gives low-loss transmission characteristics to the received signal, the shared circuit (T / R) Is provided with a leakage means (44) for outputting a part of the transmission signal (Pf) of the carrier frequency f output from the transmission section (T) to the reception section (R) through the circulator (41). 44) with the leaky transmission signal of the frequency f obtained as one reception input, the reception unit (R) uses the local oscillator (3
Frequency conversion by the local carrier of the predetermined frequency FLOC of 1) (3
2) Then, the second intermediate frequency (f) which is lower than the transmission frequency f of the transmitter (T) by a constant frequency difference (f R -FLOC).
IF2) signal is obtained and output to the transmission unit (T), and the automatic frequency control circuit (2) of the transmission unit (T) outputs the second intermediate frequency (fIF2) from the reception unit (R). The frequency (FIF2) that is uniquely defined as the frequency of the signal is defined as the difference between the specified transmission frequency FT of the transmitter (T) and the constant local carrier frequency FLOC of the receiver (R), and is used as the reference for frequency identification (21). It is configured to frequency identify as frequency (f 0 ).
以上の考え方に基いて構成された本発明の無線装置の全
体動作を第１図の原理ブロック図を用いて説明する。The overall operation of the wireless device of the present invention configured based on the above concept will be described with reference to the principle block diagram of FIG.
FM変調発振器１により得られた搬送波周波数ｆのFM変調
信号Pfは、送信部Ｔの送信出力として出力され、共用回
路T/R4に入力される。The FM modulation signal Pf of the carrier frequency f obtained by the FM modulation oscillator 1 is output as the transmission output of the transmission unit T and input to the shared circuit T / R4.
共用回路T/R4に入力された搬送波周波数ｆの送信信号Pf
は、サーキュレータ41において大部分が空中線系Ａの方
向に伝送されるが、送信信号Pfの一部分は点線で示すご
とく、本発明の漏洩手段44である受信帯域通過フィルタ
RBF 44の方向へ漏洩する。Transmission signal Pf of carrier frequency f input to shared circuit T / R4
Is mostly transmitted in the direction of the antenna system A in the circulator 41, but a part of the transmission signal Pf is a reception bandpass filter which is the leakage means 44 of the present invention as shown by a dotted line.
It leaks in the direction of RBF 44.
受信帯域通過フィルタRBF 44の伝送特性は、第４図の周
波数特性図に示すごとく、相手局からの本来の受信周波
数fRの受信信号のみならず、自局の送信部Ｔの出力の送
信周波数ｆの漏洩送信搬送波をも通過させる周波数特性
をもつので、サーキュレータ41から漏洩した送信搬送波
Pfは、この受信帯域通過フィルタRBF 44を通過して受信
部R3に入力される。As shown in the frequency characteristic diagram of FIG. 4, the transmission characteristic of the reception band pass filter RBF 44 is not only the reception signal of the original reception frequency fR from the partner station but also the transmission frequency f of the output of the transmission unit T of the own station. Since it has the frequency characteristic of passing the leaky transmission carrier of, the transmission carrier leaked from the circulator 41
Pf passes through this reception band pass filter RBF 44 and is input to the reception unit R3.
受信部R3に入力された漏洩送信搬送波Pfは、受信部R3の
周波数変換器32において、局部発振器31の発振する周波
数FLOCの局部搬送波と混合され、その出力段に送信搬送
波の周波数ｆと局部搬送波の周波数FLOCの差の第２の中
間周波数f IF2の信号を発生する。The leaky transmission carrier Pf input to the receiving unit R3 is mixed with the local carrier of the frequency FLOC oscillated by the local oscillator 31 in the frequency converter 32 of the receiving unit R3, and the frequency f and the local carrier of the transmitting carrier are output at its output stage. Generate a signal at the second intermediate frequency f IF2 of the difference in frequency FLOC of
この第２の中間周波数f IF2の信号は、受信信号fRを同
様に変換して得られる第１の中間周波fIF 1の信号と共
に受信部Ｒの周波数変換器32から出力される。The signal of the second intermediate frequency fIF2 is output from the frequency converter 32 of the receiving unit R together with the signal of the first intermediate frequency fIF1 obtained by similarly converting the received signal fR.
受信部Ｒから出力された第２の中間周波fIF 2の信号
は、第１の中間周波f IF1の信号と選別され、送信部Ｔ
の自動周波数制御回路AFC 2に導かれて周波数識別器21
に入力される。The signal of the second intermediate frequency f IF 2 output from the receiving unit R is selected from the signal of the first intermediate frequency f IF 1 and the transmitting unit T
Guided by the automatic frequency control circuit AFC 2 of the frequency discriminator 21
Entered in.
周波数識別器21に入力される第２の中間周波数f IF2の
信号は、その識別回路（IF/DISCR）の所定の周波数FIF2
を基準周波数f0として、その周波数が識別され、第３図
の周波数識別器の特性図に示すごとく、周波数偏差に相
当する誤差電圧Ecを出力する。The signal of the second intermediate frequency f IF2 input to the frequency discriminator 21 is a predetermined frequency FIF2 of the discrimination circuit (IF / DISCR).
Is used as the reference frequency f 0 , the frequency is identified, and the error voltage Ec corresponding to the frequency deviation is output as shown in the characteristic diagram of the frequency identifier of FIG.
周波数識別器21の識別回路（IF/DISCR）の基準周波数f0
は、送信部Ｔの規定送信周波数FTと受信部Ｒの局部搬送
波の所定周波数FLCOとの差として一義的に定まる規定差
周波数FIF 2に選定されているので、周波数識別器21
は、その入力信号の周波数f IF2を規定差周波数FIF 2を
基準として識別することによって送信周波数ｆの偏差Δ
ｆを識別できる。Reference frequency f 0 of the discrimination circuit (IF / DISCR) of the frequency discriminator 21
Is selected as the prescribed difference frequency FIF 2 that is uniquely determined as the difference between the prescribed transmission frequency FT of the transmitter T and the prescribed frequency FLCO of the local carrier of the receiver R, so that the frequency discriminator 21
Identifies the deviation Δ of the transmission frequency f by identifying the frequency f IF2 of the input signal with reference to the specified difference frequency F IF 2.
f can be identified.
出力された誤差電圧Ecは、従来例の自動周波数制御回路
AFC 2の動作と同じく送信部ＴのFM変調発振器１の変調
入力端に帰還され、その発振周波数ｆを規定の周波数FT
になるように自動的に制御する。The output error voltage Ec is the conventional automatic frequency control circuit.
Similar to the operation of AFC 2, it is fed back to the modulation input terminal of the FM modulation oscillator 1 of the transmitter T, and its oscillation frequency f is set to the specified frequency FT.
To automatically control.
以上が第１図にその原理ブロック図を示した本発明の無
線装置の動作の概略であるが、本発明の自動周波数制御
回路AFC 2の周波数識別器21の識別回路（IF/DISCR）の
基準周波数f0となる中間周波数FIF 2は、以下に説明す
るごとく、送信周波数FTや受信周波数fRが20GHz〜30GHz
帯の場合、数百MHz帯という中間周波数の値となるの
で、この基準周波数f0を決める回路要素の機械寸法が手
頃で作りやすく、周囲温度の変化や振動など環境変化に
対して安定度が良くなり、従来の無線装置の問題点が解
決される。また、基準周波数f0が数百MHzと適度に周波
数が高いので識別回路の小形化も図れる。The above is the outline of the operation of the wireless device of the present invention whose principle block diagram is shown in FIG. 1. Reference of the identification circuit (IF / DISCR) of the frequency discriminator 21 of the automatic frequency control circuit AFC 2 of the present invention The intermediate frequency FIF 2, which is the frequency f 0 , has a transmission frequency FT and a reception frequency fR of 20 GHz to 30 GHz, as described below.
In the case of the band, the value of the intermediate frequency of several hundreds of MHz band is obtained, so the mechanical dimensions of the circuit element that determines this reference frequency f 0 are easy to make, and the stability against environmental changes such as ambient temperature changes and vibrations is high. It improves and solves the problems of conventional wireless devices. Further, since the reference frequency f 0 is a moderately high frequency of several hundred MHz, the identification circuit can be downsized.
上述の周波数識別器21の基準周波数f0となる規定差周波
数FIF 2が、送信周波数FTや受信周波数fRに比して周波
数の低い中間周波数となることを具体的に説明すると、 送信周波数FT、受信周波数fRが20GHz〜30GHz帯のマイク
ロ波周波数帯の場合、送信周波数FTと受信周波数fRとの
周波数間隔fsepは数百MHzの一定周波数に定められてい
る。The specific difference frequency FIF 2 that is the reference frequency f 0 of the frequency discriminator 21 described above will be specifically described as an intermediate frequency having a lower frequency than the transmission frequency FT and the reception frequency fR. When the reception frequency fR is in the microwave frequency band of 20 GHz to 30 GHz, the frequency interval fsep between the transmission frequency FT and the reception frequency fR is set to a constant frequency of several hundred MHz.
また、受信周波数fRと局部搬送波の周波数FLOCの差の第
１の中間周波数f IF1は、一般に70MHzの周波数が選ばれ
るので、送信周波数FTと局部搬送波周波数FLOCの差の規
定差周波数FIF 2は、fsep±70MHzとなり、やはり数百MH
z帯の中間周波数となる。Moreover, since the frequency of 70 MHz is generally selected as the first intermediate frequency f IF1 of the difference between the reception frequency fR and the frequency FLOC of the local carrier, the specified difference frequency FIF 2 of the difference between the transmission frequency FT and the local carrier frequency FLOC is fsep ± 70MHz, again hundreds of MH
It becomes the intermediate frequency of the z band.
第２図は本発明の実施例の無線装置の構成を示すブロッ
ク図である。大部分の回路は第１図の原理ブロック図に
示した回路と同じであるが、相違個所は実用的配慮か
ら、自動周波数制御回路AFC 2の周波数識別器21の前段
に第２の中間周波数f IF2の信号と第１の中間周波数f I
F1の信号とを選別する中間周波フィルタ（IF2）22を設
けたこと、受信部Ｒの周波数変換器32の後段に第１の中
間周波f IF1の信号と第２の中間周波f IF2の信号を共に
増幅する共通増幅器34を設けたことである。また、本発
明の無線装置の送信周波数安定度に関して有意性のある
相違個所として、受信部Ｒの局部発振器31を、周波数安
定度の良い水晶発振器31aと、ステップリカバリダイオ
ードなどを用いた高次周波数逓倍器31bとで構成し、周
波数安定度の良い局部発振搬送波の周波数fLOCを一挙に
周波数逓倍して簡単に得ていることである。FIG. 2 is a block diagram showing the configuration of the wireless device according to the embodiment of the present invention. Most of the circuits are the same as the circuits shown in the principle block diagram of FIG. 1, but the difference is that from a practical consideration, the second intermediate frequency f is placed in front of the frequency discriminator 21 of the automatic frequency control circuit AFC 2. IF2 signal and first intermediate frequency f I
An intermediate frequency filter (IF2) 22 for selecting the signal of F1 is provided, and a signal of the first intermediate frequency f IF1 and a signal of the second intermediate frequency f IF2 are provided at the subsequent stage of the frequency converter 32 of the receiving unit R. The common amplifier 34 that amplifies both is provided. In addition, as a significant difference with respect to the transmission frequency stability of the wireless device of the present invention, the local oscillator 31 of the receiving unit R is a crystal oscillator 31a having good frequency stability, and a higher-order frequency using a step recovery diode or the like. That is, the frequency fLOC of the locally oscillated carrier wave with good frequency stability is obtained by frequency multiplication all at once in a simple manner with the multiplier 31b.
水晶発振器31aは周囲温度が‐10℃〜＋40℃で、５×10
-6程度の周波数安定度がえられ、また、周波数識別器21
の識別回路（IF DISCR）の基準周波数f IF2が数百MHzの
とき、その安定度は上記の周囲温度範囲で１×10-5が得
られるので、局部搬送波の周波数fLOCの変動分と周波数
識別器21の基準周波数FIF 2の変動分が最悪の条件で加
わっても、送信部の搬送波周波数ｆは規定送信周波数FT
に対して、５×10-5以内の偏差に保たれ問題はない。The crystal oscillator 31a has an ambient temperature of -10 ° C to + 40 ° C and is 5 × 10
A frequency stability of about -6 can be obtained, and the frequency discriminator 21
When the reference frequency f IF2 of the discriminating circuit (IF DISCR) is several hundred MHz, its stability is 1 × 10 -5 within the above ambient temperature range. Even if the fluctuation of the reference frequency FIF 2 of the device 21 is added under the worst condition, the carrier frequency f of the transmitter is equal to the specified transmission frequency FT.
However, there is no problem because the deviation is kept within 5 × 10 -5 .
また、周波数識別器21が数百MHzの周波数帯で作られる
ので、回路の集積回路化（IC化）がGHz帯におけるより
容易となり、装置の小形化、高信頼化が容易となる。Further, since the frequency discriminator 21 is made in the frequency band of several hundred MHz, it is easier to integrate the circuit (into an IC) in the GHz band, and it is easy to make the device compact and highly reliable.
以上説明したごとく、本発明によれば、周波数安定度は
悪いが簡便なFM変調発振器を主体とする送信部の出力信
号の高い周波数の送信周波数を、製作が容易で周囲環境
の変化に対して安定な中間周波数帯の自動周波数制御回
路（AFC）によって安定化できる効果があり、また、装
置の小形化やコストダウンの効果も得られる。As described above, according to the present invention, the high frequency transmission frequency of the output signal of the transmitter mainly composed of a simple FM modulation oscillator, which has poor frequency stability, is easy to manufacture with respect to changes in the surrounding environment. The stable automatic frequency control circuit (AFC) in the intermediate frequency band has the effect of stabilizing, and the device can be downsized and the cost can be reduced.
第１図は本発明の無線装置の構成を示す原理ブロック
図、 第２図は本発明の実施例の無線装置の構成を示すブロッ
ク図、 第３図は本発明の無線装置の周波数識別器の動作を説明
する特性図、 第４図は本発明の無線装置の動作を説明する共用回路の
受信帯域通過フィルタの周波数特性図、 第５図は従来例の無線装置の構成を示すブロック図であ
る。 第１、第２、第５図において、 １はFM変調発振器、 1aは方向性結合器、 ２は自動周波数制御回路（AFC）、 21は周波数識別器（IF/DISCR）、 22は中間周波フィルタ（IF2）、 23は周波数識別器（RF/DISCR）、 23aは直流増幅器、 ３は受信部、 31は局部発振器、 32は周波数変換器、 33は中間周波フィルタ（IF1）、 34は共通増幅器、 ４は共用回路（T/R）、 41はサーキュレータ、 42は送信帯域通過フィルタ、 43、44は受信帯域通過フィルタである。FIG. 1 is a principle block diagram showing a configuration of a wireless device of the present invention, FIG. 2 is a block diagram showing a configuration of a wireless device of an embodiment of the present invention, and FIG. 3 is a frequency discriminator of the wireless device of the present invention. FIG. 4 is a characteristic diagram for explaining the operation, FIG. 4 is a frequency characteristic diagram of a reception bandpass filter of a shared circuit for explaining the operation of the wireless device of the present invention, and FIG. 5 is a block diagram showing a configuration of a conventional wireless device. . In FIGS. 1, 2 and 5, 1 is an FM modulation oscillator, 1a is a directional coupler, 2 is an automatic frequency control circuit (AFC), 21 is a frequency discriminator (IF / DISCR), and 22 is an intermediate frequency filter. (IF2), 23 is a frequency discriminator (RF / DISCR), 23a is a DC amplifier, 3 is a receiving unit, 31 is a local oscillator, 32 is a frequency converter, 33 is an intermediate frequency filter (IF1), 34 is a common amplifier, 4 is a shared circuit (T / R), 41 is a circulator, 42 is a transmission band pass filter, and 43 and 44 are reception band pass filters.
Claims (1)
信号により周波数変調されるFM変調発振器（１）と、該
FM変調発振器（１）の出力Pfの搬送周波数ｆを予め定め
られる基準周波数（f0）により周波数識別（21）し其の
出力の誤差電圧Ecを前記FM変調発振器（１）に帰還し該
出力Pfの搬送周波数ｆを規定の送信周波数FTに自動的に
制御する自動周波数制御回路（２）からなる送信部
（Ｔ）と、前記規定の送信周波数FTと一定周波数関係に
ある相手送信機からの受信周波数fRの受信信号を一定の
周波数差（fR-FLOC）の中間周波数の信号（fIF1）に変
換（32）する所定周波数FLOCの局部搬送波を発生する局
部発振器（31）をもつ受信部（Ｒ）と、前記送信部
（Ｔ）の出力の搬送周波数ｆの送信信号（Pf）と相手送
信機から受信して受信部（Ｒ）に向かう周波数fRの受信
信号に対しては低損失の伝送特性を与えるサーキュレー
タ（41）によって１つの空中線系（Ａ）を共用する共用
回路（T/R）からなる無線装置において、 前記共用回路（T/R）に、送信部（Ｔ）の出力の搬送周
波数ｆの送信信号（Pf）の一部を該サーキュレータ（4
1）を通し受信部（Ｒ）へ出力する漏洩手段（44）を設
け、 該漏洩手段（44）により得られた周波数ｆの漏洩送信信
号を１受信入力として前記受信部（Ｒ）が局部発振器
（31）の所定周波数FLOCの局部搬送波により周波数変換
（32）し前記送信部（Ｔ）の送信周波数ｆよりも一定周
波数差（fR-FLOC）だけ低い周波数の第２の中間周波数
（fIF2）の信号を得て前記送信部（Ｔ）へ出力させ、 該送信部（Ｔ）の自動周波数制御回路（２）が、該受信
部（Ｒ）からの第２の中間周波数（fIF2）信号の周波数
を、前記送信部（Ｔ）の規定の送信周波数FTと受信部
（Ｒ）の一定の局部搬送波周波数FLOCとの差として一義
的に定まる周波数（FIF2）を周波数識別（21）の基準周
波数（f0）として周波数識別することを特徴とした無線
装置。1. An FM modulation oscillator (1) which oscillates a carrier wave of frequency f and is frequency-modulated by a modulation signal at the same time,
The carrier frequency f of the output Pf of the FM modulation oscillator (1) is frequency identified (21) by a predetermined reference frequency (f 0 ), and the error voltage Ec of the output is fed back to the FM modulation oscillator (1) to output the output. A transmitter (T) including an automatic frequency control circuit (2) for automatically controlling the carrier frequency f of Pf to a specified transmission frequency FT, and a partner transmitter having a constant frequency relationship with the specified transmission frequency FT. constant frequency difference reception signal of the reception frequency f R (f R -FLOC) receiver having a local oscillator (31) for generating a local carrier of a predetermined frequency FLOC be converted into an intermediate frequency signal (fIF1) (32) of (R), a low loss for the transmission signal (Pf) of the carrier frequency f output from the transmission unit (T) and the reception signal of the frequency f R received from the partner transmitter and directed to the reception unit (R). Circulator (41) that gives the transmission characteristics of one antenna system (A) In the radio apparatus consisting shared circuit sharing (T / R), the common circuits (T / R), a portion of the circulator of the transmission signal of the carrier frequency f of the output of the transmitter (T) (Pf) (4
Leakage means (44) for outputting to the reception section (R) through 1) is provided, and the reception section (R) receives the leakage transmission signal of the frequency f obtained by the leakage means (44) as one reception input, and the reception section (R) makes the local oscillator. The second intermediate frequency (fIF2), which is frequency-converted (32) by the local carrier of the predetermined frequency FLOC of (31) and is lower than the transmission frequency f of the transmitter (T) by a constant frequency difference (f R -FLOC). Of the second intermediate frequency (fIF2) signal from the receiving section (R), and the automatic frequency control circuit (2) of the transmitting section (T) outputs the frequency of the second intermediate frequency (fIF2) signal. Is the frequency (FIF2) that is uniquely determined as the difference between the specified transmission frequency FT of the transmitter (T) and the constant local carrier frequency FLOC of the receiver (R), and the reference frequency (f) of the frequency identification (21). 0 ) A radio device characterized by frequency identification as 0 ).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61188113A JPH0671217B2 (en) | 1986-08-11 | 1986-08-11 | Wireless device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61188113A JPH0671217B2 (en) | 1986-08-11 | 1986-08-11 | Wireless device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6343421A JPS6343421A (en) | 1988-02-24 |
| JPH0671217B2 true JPH0671217B2 (en) | 1994-09-07 |
Family
ID=16217929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61188113A Expired - Fee Related JPH0671217B2 (en) | 1986-08-11 | 1986-08-11 | Wireless device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0671217B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5481341B2 (en) * | 2010-09-29 | 2014-04-23 | 京セラ株式会社 | Communication apparatus and distortion compensation method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1023434A (en) * | 1973-03-02 | 1977-12-27 | Salvatore Amoroso (Jr.) | Single oscillator microwave transceiver |
-
1986
- 1986-08-11 JP JP61188113A patent/JPH0671217B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6343421A (en) | 1988-02-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |