JPH044782B2 - - Google Patents
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- Publication number
- JPH044782B2 JPH044782B2 JP60209782A JP20978285A JPH044782B2 JP H044782 B2 JPH044782 B2 JP H044782B2 JP 60209782 A JP60209782 A JP 60209782A JP 20978285 A JP20978285 A JP 20978285A JP H044782 B2 JPH044782 B2 JP H044782B2
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- signal
- high frequency
- antenna
- analyzer
- 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.)
- Expired - Lifetime
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Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、例えばレーダ電波の様な高周波信
号（以下、RF信号という。）の諸元を分析し、そ
の分析した高周波周波数にほぼ等しい周波数の
RF信号を送信する利得制御形送受信機に関する。[Detailed Description of the Invention] [Field of Industrial Application] This invention analyzes the specifications of a high frequency signal (hereinafter referred to as an RF signal) such as a radar radio wave, and detects a frequency approximately equal to the analyzed high frequency frequency. of
This invention relates to a gain-controlled transceiver that transmits RF signals.
従来この種の送受信機としては第２図に示すも
のがあつた。図において、１は受信アンテナ、２
はRF増幅器、３は周波数分析器、４は置換発振
器、５はRF電力増幅器、６は送信アンテナであ
る。また７は受信アンテナ１に入力されるRF信
号でその周波数が1ＭHz、入力レベルがP1dBm
とする。また８は送信アンテナ６から送信される
RF信号で受信アンテナ１に入力されるRF信号の
周波数にほぼ等しく、その周波数を1＋Δ1Ｍ
Hz、送信レベルをP2dBmとする。また９は送信
RF信号の中で受信アンテナ側に回り込んで来る
回り込みRF信号で空間損失をL0dBとすると、回
り込みレベルは（P2−L0）dBmとなる。
A conventional transmitter/receiver of this type is shown in FIG. In the figure, 1 is a receiving antenna, 2
is an RF amplifier, 3 is a frequency analyzer, 4 is a displacement oscillator, 5 is an RF power amplifier, and 6 is a transmitting antenna. 7 is an RF signal input to receiving antenna 1, its frequency is 1 MHz, and its input level is P 1 dBm.
shall be. 8 is also transmitted from the transmitting antenna 6
The frequency of the RF signal is approximately equal to the frequency of the RF signal input to receiving antenna 1, and the frequency is 1 + Δ 1 M.
Hz, and the transmission level is P 2 dBm. Also 9 is sending
Assuming that the spatial loss in the RF signal that loops around to the receiving antenna side is L 0 dB, the loop level is (P 2 −L 0 ) dBm.
次に動作について説明する。受信アンテナ１で
受信されたRF信号７はRF増幅器２で増幅され、
周波数分析器３で周波数1ＭHzについて分析され
る。その分析された周波数に基づき、置換発振器
４で周波数（1＋Δ1）ＭHzのRF信号を発生し、
RF電力増幅器５で電力増幅され、送信アンテナ
６から送信RF信号８として送信される。 Next, the operation will be explained. The RF signal 7 received by the receiving antenna 1 is amplified by the RF amplifier 2,
The frequency analyzer 3 analyzes the frequency of 1 MHz. Based on the analyzed frequency, a replacement oscillator 4 generates an RF signal with a frequency of ( 1 + Δ 1 ) MHz,
The power is amplified by the RF power amplifier 5 and transmitted from the transmitting antenna 6 as a transmitting RF signal 8 .
送信RF信号８の送信レベルであるP2dBmは一
定であり、受信アンテナ１側への空間損失L0dB
も一定と考えられるため、送信アンテナ８から受
信アンテナ１側への回り込む回り込みレベル
（P2−L0）dBmも一定となる。 The transmission level of the transmission RF signal 8, P 2 dBm, is constant, and the spatial loss L 0 dB to the reception antenna 1 side
is also considered to be constant, so the loop level (P 2 −L 0 ) dBm from the transmitting antenna 8 to the receiving antenna 1 side is also constant.
なお、上記受信機能は広い周波数帯域（1から
1＋Δ1以上）で作動可能とする。 Please note that the above reception function supports a wide frequency band (from 1 to
1 + Δ 1 or more).
従来の送受信機は以上の様に構成されているた
め、RF信号７の入力レベルP1dBmが
P1dBm＜（P2dBm−L0dB）
とである場合、周波数分析器３においてRF信号
７の1ＭHzの周波数分析が困難となり、その結果
送信アンテナ８から（1＋Δ1）ＭHzの周波数を
送信する事が不可能になる。
Since the conventional transceiver is configured as described above, when the input level P 1 dBm of the RF signal 7 is P 1 dBm<(P 2 dBm−L 0 dB), the frequency analyzer 3 detects the RF signal. 7 becomes difficult to analyze, and as a result, it becomes impossible to transmit a frequency of ( 1 + Δ 1 ) MHz from the transmitting antenna 8.
この発明は、上記のような不都合を解消するた
めになされたもので、送信アンテナからの回り込
みレベルが受信アンテナに入力される入力レベル
よりも大きくならないようにし、受信アンテナに
入力されるRF信号にほぼ等しい周波数のRF信号
の送信を可能とした利得制御形送受信機を得るこ
とを目的とする。 This invention was made in order to eliminate the above-mentioned disadvantages, and it prevents the level of feedback from the transmitting antenna from becoming larger than the input level input to the receiving antenna, and prevents the RF signal input to the receiving antenna from becoming The purpose of this invention is to obtain a gain-controlled transceiver that can transmit RF signals of approximately the same frequency.
この発明に係る利得制御形送受信機は、高周波
信号を受信する受信アンテナと、この受信アンテ
ナからの高周波信号を分析する周波数分析器と、
この周波数分析器による高周波周波数によつてこ
の高周波周波数にほぼ等しい信号を発生する置換
発振器と、この置換発振器からの出力を送信する
送信アンテナと、上記受信アンテナからの高周波
信号の出力を減衰させる第１の可変減衰器と、上
記置換発振器からの出力を減衰させる第２の可変
減衰器と、上記受信アンテナからの上記高周波信
号が供給され、その高周波信号レベルを分析する
高周波信号レベル分析器とを具備し、この高周波
信号レベル分析器により、上記第１の可変減衰器
を制御して受信感度を調整すると共に、上記第２
の可変減衰器を制御して上記送信アンテナから受
信アンテナへの回り込み信号によつても上記周波
数分析器による高周波信号の分析を可能としたも
のである。
A gain-controlled transceiver according to the present invention includes a receiving antenna that receives a high-frequency signal, a frequency analyzer that analyzes the high-frequency signal from the receiving antenna,
A displacement oscillator that generates a signal approximately equal to the high frequency frequency by the high frequency frequency of the frequency analyzer, a transmitting antenna that transmits the output from the displacement oscillator, and a second antenna that attenuates the output of the high frequency signal from the receiving antenna. a second variable attenuator that attenuates the output from the displacement oscillator; and a high frequency signal level analyzer that is supplied with the high frequency signal from the receiving antenna and analyzes the high frequency signal level. The high-frequency signal level analyzer controls the first variable attenuator to adjust the receiving sensitivity, and the second variable attenuator is controlled by the high-frequency signal level analyzer.
By controlling the variable attenuator, the frequency analyzer can analyze high-frequency signals even by loop signals from the transmitting antenna to the receiving antenna.
この発明における高周波信号レベル分析器は受
信アンテナからの高周波信号レベルを分析して上
記第２の可変減衰器を制御し、送信アンテナから
受信アンテナへの回り込みレベルが受信アンテナ
へ供給される高周波信号レベルより大きくならな
いように調整することにより、上記送信アンテナ
から上記高周波信号にほぼ等しい周波数の信号を
送信することができる。
The high frequency signal level analyzer in this invention analyzes the high frequency signal level from the receiving antenna to control the second variable attenuator, and the loop level from the transmitting antenna to the receiving antenna is the high frequency signal level supplied to the receiving antenna. By adjusting the frequency so that it does not become larger, it is possible to transmit a signal with a frequency substantially equal to the high frequency signal from the transmitting antenna.
〔実施例〕
以下、この発明の一実施例を第１図を用いて説
明する。第１図において、１は受信アンテナ、２
はRF増幅器、３は周波数分析器、４は置換発振
器、５はRF電力増幅器、６は送信アンテナ、７
は受信アンテナ１に入力されるRF信号、８は送
信アンテナ６から送信され、RF信号７にほぼ等
しい周波数のRF信号、９は送信アンテナ６から
受信アンテナ１側に回り込んで来るRF信号、１
０はRF信号分配器、１１はRF信号レベル分析
器、１２，１３は可変減衰器である。[Example] An example of the present invention will be described below with reference to FIG. In Figure 1, 1 is a receiving antenna, 2
is an RF amplifier, 3 is a frequency analyzer, 4 is a displacement oscillator, 5 is an RF power amplifier, 6 is a transmitting antenna, 7
is an RF signal input to the receiving antenna 1, 8 is an RF signal transmitted from the transmitting antenna 6 and has a frequency almost equal to that of the RF signal 7, 9 is an RF signal coming from the transmitting antenna 6 to the receiving antenna 1 side, 1
0 is an RF signal splitter, 11 is an RF signal level analyzer, and 12 and 13 are variable attenuators.
第１図において、RF信号７は受信アンテナ１
で受信され、受信系の可変減衰器１２で、適量の
減衰を受けて受信感度を調整され、RF増幅器２
で一定量増幅され、RF信号分配器１０で分配さ
れ、周波数分析器３と、RF信号レベル分析器１
１に入力される。周波数分析器３で分析された周
波数1ＭHzをもとに、置換発振器４で（1＋Δ）
ＭHzのRF信号を発生し、RF電力増幅器５で電力
増幅し、可変減衰器１３で適量の減衰量を与えら
れて後、送信アンテナ６からRF信号８として送
信される。 In FIG. 1, the RF signal 7 is transmitted to the receiving antenna 1.
It is received by the variable attenuator 12 in the reception system, receives an appropriate amount of attenuation to adjust the reception sensitivity, and then is sent to the RF amplifier 2.
It is amplified by a certain amount at
1 is input. Based on the frequency 1 MHz analyzed by the frequency analyzer 3, the replacement oscillator 4 calculates ( 1 + Δ)
A MHz RF signal is generated, power amplified by an RF power amplifier 5, and after being given an appropriate amount of attenuation by a variable attenuator 13, it is transmitted from a transmitting antenna 6 as an RF signal 8.
今、受信アンテナ１に入力される周波数1ＭHz
のRF信号７の入力レベルをP1dBm、可変減衰器
１２の減衰量をL1dBm、送信アンテナ６から送
信される周波数（1＋Δ1）ＭHzのRF信号８の送
信レベルをP2dBm、可変減衰器１３の減衰量を
L2dBm送信アンテナ６から受信アンテナ１への
回り込み時の空間減衰量をL0dBmとする。L0
dBmは一定であるが、P1dBmはそのレベルが変
化する。そこで、RF信号レベル分析器１１によ
り、例えば周波数1ＭHzに基づく信号レベルと周
波数（1＋Δ1）ＭHzに基づく信号レベルを比較
し、
（P1−L1）dBm＞（P2−L2−L0）dBm …(1)
を満足する様に可変減衰器１２，１３の減衰量
L1dBm，L2dBmをそれぞれ制御する。従つて、
周波数1ＭHzのRF信号７の入力信号レベルが小
さく変化しても、それに伴なつて、可変減衰器１
３の減衰量L2dBmを大きくすることにより、(1)
式を満足するように制御でき、小さな入力レベル
に対して小さなレベルでの送信が可能となる。同
時に送信アンテナ６から受信アンテナ１への回り
込みレベルを小さくでき、この回り込みによる
RF信号７の受信を阻害しにくくなる。 Now, the frequency input to receiving antenna 1 is 1 MHz.
The input level of the RF signal 7 is P 1 dBm, the attenuation amount of the variable attenuator 12 is L 1 dBm, the transmission level of the RF signal 8 with the frequency ( 1 + Δ 1 ) MHz transmitted from the transmitting antenna 6 is P 2 dBm, The attenuation amount of the variable attenuator 13
L 2 dBm The amount of spatial attenuation when looping from the transmitting antenna 6 to the receiving antenna 1 is L 0 dBm. L 0
dBm is constant, but the level of P 1 dBm changes. Therefore, the RF signal level analyzer 11 compares the signal level based on the frequency 1 MHz and the signal level based on the frequency ( 1 + Δ 1 ) MHz, and calculates that (P 1 −L 1 )dBm＞(P 2 −L 2 − Attenuation amount of variable attenuators 12 and 13 to satisfy L 0 ) dBm...(1)
Controls L 1 dBm and L 2 dBm respectively. Therefore,
Even if the input signal level of the RF signal 7 with a frequency of 1 MHz changes slightly, the variable attenuator 1
By increasing the attenuation L 2 dBm in 3, (1)
It can be controlled so that the formula is satisfied, and it is possible to transmit at a small level for a small input level. At the same time, the level of wraparound from the transmitting antenna 6 to the receiving antenna 1 can be reduced, and due to this wraparound,
The reception of the RF signal 7 is less likely to be obstructed.
また、大きな入力レベルに対しては、可変減衰
器１３の減衰量L2dBmを小さくして、大きなレ
ベルの送信が可能となる。もつとも、可変減衰器
１２は受信感度を調整するためのものであり、こ
の減衰量L1dBmを考慮して上記(1)式を満たすよ
うに、可変減衰器１３の減衰量L2dBmを調整す
る。 Furthermore, for a large input level, the attenuation amount L 2 dBm of the variable attenuator 13 is reduced, making it possible to transmit a large level. However, the variable attenuator 12 is for adjusting the reception sensitivity, and the attenuation amount L 2 dBm of the variable attenuator 13 is adjusted in consideration of this attenuation amount L 1 dBm so as to satisfy the above equation (1). do.
また、高周波信号レベル分析器１１により、周
波数1ＭHzによる入力レベルを検出することによ
り、この入力レベルが極めて小さい場合には、可
変減衰器１３の減衰量を大きくするか、あるいは
置換発振器４の発振を停止するなどして不用な送
信を避けることもできる。 Furthermore, by detecting the input level at a frequency of 1 MHz using the high-frequency signal level analyzer 11, if this input level is extremely small, the attenuation amount of the variable attenuator 13 is increased or the oscillation of the replacement oscillator 4 is increased. Unnecessary transmission can also be avoided by stopping .
なお、上記実施例では送信系の可変減衰器１３
の位置を電力増幅器５と送信アンテナ６の間に設
けているが電力増幅器５と置換発振器４との間に
設けてもよい。 Note that in the above embodiment, the variable attenuator 13 of the transmission system
Although the position is provided between the power amplifier 5 and the transmitting antenna 6, it may also be provided between the power amplifier 5 and the replacement oscillator 4.
また、同様に可変減衰器１２とRF増幅器２の
位置を逆にしてもよい。 Furthermore, the positions of the variable attenuator 12 and the RF amplifier 2 may be similarly reversed.
以上のようにこの発明によれば、高周波信号レ
ベル分析器を設け、送信アンテナから受信アンテ
ナへの回り込みレベルが受信アンテナへ入力され
る高周波信号レベルより大きくならないように、
上記高周波信号レベル分析器の出力により第２の
可変減衰器の減衰量を制御するように構成したの
で、受信アンテナに入力される高周波信号レベル
が変動しても上記高周波信号の周波数にほぼ等し
い周波数の信号を送信アンテナから送信すること
ができる。
As described above, according to the present invention, a high-frequency signal level analyzer is provided to prevent the level of looping from the transmitting antenna to the receiving antenna from becoming larger than the high-frequency signal level input to the receiving antenna.
Since the attenuation amount of the second variable attenuator is controlled by the output of the high frequency signal level analyzer, even if the high frequency signal level input to the receiving antenna fluctuates, the frequency is almost equal to the frequency of the high frequency signal. signals can be transmitted from the transmitting antenna.
第１図はこの発明の一実施例を示す利得制御形
送受信機の構成図、第２図は従来の送受信機の構
成図である。
第１図において、１は受信アンテナ、２はRF
増幅器、３は周波数分析器、４は置換発振器、５
はRF電力増幅器、６は送信アンテナ、７は入力
RF信号、８はRF信号、９は受信アンテナ側に回
り込んで来るRF信号、１０はRF信号分配器、１
１はRF信号レベル分析器、１２，１３は可変減
衰器である。なお、図中同一符号は同一又は相当
部分を示す。
FIG. 1 is a block diagram of a gain control type transceiver showing an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional transceiver. In Figure 1, 1 is the receiving antenna, 2 is the RF
amplifier, 3 is a frequency analyzer, 4 is a displacement oscillator, 5
is the RF power amplifier, 6 is the transmitting antenna, and 7 is the input
RF signal, 8 is an RF signal, 9 is an RF signal that goes around to the receiving antenna side, 10 is an RF signal splitter, 1
1 is an RF signal level analyzer, and 12 and 13 are variable attenuators. Note that the same reference numerals in the figures indicate the same or equivalent parts.
Claims (1)
受信アンテナからの高周波信号を分析する周波数
分析器と、この周波数分析器による高周波周波数
によつてこの高周波周波数にほぼ等しい信号を発
生する置換発振器と、この置換発振器からの出力
を送信する送信アンテナと、上記受信アンテナか
らの高周波信号の出力を減衰させる第１の可変減
衰器と、上記置換発振器からの出力を減衰させる
第２の可変減衰器と上記受信アンテナからの上記
高周波信号が供給され、その高周波信号レベルを
分析する高周波信号レベル分析器とを具備し、こ
の高周波信号レベル分析により、上記第１の可変
減衰器を制御して受信感度を調整すると共に、上
記第２の可変減衰器を制御して上記送信アンテナ
から上記受信アンテナへの回り込み信号によつて
も上記周波数分析器による高周波信号の分析を可
能としたことを特徴とする利得制御形送受信機。1. A receiving antenna that receives a high frequency signal, a frequency analyzer that analyzes the high frequency signal from this receiving antenna, a displacement oscillator that generates a signal approximately equal to the high frequency frequency by the high frequency frequency of this frequency analyzer, and this a transmitting antenna that transmits the output from the displacement oscillator, a first variable attenuator that attenuates the output of the high frequency signal from the reception antenna, a second variable attenuator that attenuates the output from the displacement oscillator, and the reception. A high frequency signal level analyzer is provided to which the high frequency signal from the antenna is supplied and analyzes the high frequency signal level, and the first variable attenuator is controlled by the high frequency signal level analysis to adjust the receiving sensitivity. In addition, the gain control type transmitting/receiving device is characterized in that the second variable attenuator is controlled to enable the frequency analyzer to analyze high frequency signals even by looping signals from the transmitting antenna to the receiving antenna. Machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20978285A JPS6269738A (en) | 1985-09-21 | 1985-09-21 | Gain controlled transceiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20978285A JPS6269738A (en) | 1985-09-21 | 1985-09-21 | Gain controlled transceiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6269738A JPS6269738A (en) | 1987-03-31 |
| JPH044782B2 true JPH044782B2 (en) | 1992-01-29 |
Family
ID=16578511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20978285A Granted JPS6269738A (en) | 1985-09-21 | 1985-09-21 | Gain controlled transceiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6269738A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0801474B1 (en) * | 1995-10-26 | 2005-12-21 | Ntt Mobile Communications Network Inc. | Booster |
| JP4542913B2 (en) * | 2005-02-03 | 2010-09-15 | Ｏｋｉセミコンダクタ株式会社 | Mobile terminal device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5586209A (en) * | 1978-12-22 | 1980-06-28 | Nec Corp | Automatic high-frequency level regulator circuit |
-
1985
- 1985-09-21 JP JP20978285A patent/JPS6269738A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6269738A (en) | 1987-03-31 |
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