JPS63126328A - Semi-duplex system transmission and reception equipment - Google Patents
Semi-duplex system transmission and reception equipmentInfo
- Publication number
- JPS63126328A JPS63126328A JP27317986A JP27317986A JPS63126328A JP S63126328 A JPS63126328 A JP S63126328A JP 27317986 A JP27317986 A JP 27317986A JP 27317986 A JP27317986 A JP 27317986A JP S63126328 A JPS63126328 A JP S63126328A
- Authority
- JP
- Japan
- Prior art keywords
- frequency signal
- signal
- transmission
- receiving
- transmitting
- 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
- 230000005540 biological transmission Effects 0.000 title claims abstract description 28
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 6
- 230000010355 oscillation Effects 0.000 description 5
- 230000002238 attenuated effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Transceivers (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、送信周波信号の一部を適宜なレベルで局部発
振信号として受信用ミキサに人力できるようにした半二
重方式送受信装置に関するものである。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a half-duplex transmitting/receiving device in which a part of a transmitting frequency signal can be manually input to a receiving mixer as a local oscillation signal at an appropriate level. It is.
（従来の技術）
マイクロ波およびミリ波帯の搬送波を用い、送信周波信
号と受信周波信号の周波数が相違する双方向通信装置で
あって、構造を簡易化した装置として、半二重方式送受
信装置がある。この半二重方式送受信装置は、１本のア
ンテンを送信用と受信用に兼用し、しかも送信周波信号
の一部を受信用の局部発振信号として用いて、装置全体
としての発＋ｉ器の数を少なくしたものである。(Prior Art) A half-duplex transmitting/receiving device is a two-way communication device that uses microwave and millimeter wave band carrier waves and has different frequencies for transmitting frequency signals and receiving frequency signals, and has a simplified structure. There is. This half-duplex transmitter/receiver uses one antenna for both transmission and reception, and also uses part of the transmit frequency signal as a local oscillation signal for reception, increasing the number of oscillators in the entire device. It is a reduction of .
第３図に、従来の半二重方式送受信袋；δの要部のブロ
ック回路図を示す。FIG. 3 shows a block circuit diagram of the main parts of a conventional half-duplex transmitting/receiving bag; δ.
第３図において、送信側１に設けられた発振；≦２が変
調回路３で適宜にルリ御されて送信周波４３号ｆＴを発
生し、送受切換回路４の送信側フィルタ５を介して分岐
回路６の一端に与えられる。そして、この送信周波信号
ｆ７は分岐回路６か接続されたアンテナ７を介して放射
されるとともに、その一部は受信側８の受信用ミクサ９
に与えられる。In FIG. 3, the oscillation; given at one end of 6. This transmission frequency signal f7 is radiated via the antenna 7 connected to the branch circuit 6, and a part of it is transmitted to the receiving mixer 9 on the receiving side 8.
given to.
また、送信周波信号１丁と周波数の異なる受イ１）周波
信号ｆ １１がアンテナ７で受信され、分岐回路６の他
端から受信用ミキサ９にＣ＞えられる。そして、この受
信用ミクサ９において、受信周波信号ｆ３と局部発振信
号として与えられる送信周波信号ｆＴが混合され、その
混合出力が復調回路１０に与えられて適宜に受信信号が
復調される。Further, a receiving frequency signal f11 having a different frequency from the one transmitting frequency signal is received by the antenna 7, and is sent from the other end of the branch circuit 6 to the receiving mixer 9. In the receiving mixer 9, the receiving frequency signal f3 and the transmitting frequency signal fT given as a local oscillation signal are mixed, and the mixed output is given to a demodulation circuit 10 to appropriately demodulate the received signal.
なお、送（３側フイルタ５は送信周波信号ｆＴを減衰さ
せることなく通過させ、受信周波信号ｆ８の通過を阻止
する特性に設定されている。Note that the transmission (third side filter 5) is set to have a characteristic of allowing the transmission frequency signal fT to pass through without attenuating it and blocking the reception frequency signal f8 from passing therethrough.
（発明が解決しようとする問題点）
かかる構成において、送信周波信号１丁がアンテナ７か
ら放射される送イ８電力を大とすべく送信、 側１の
出力を増大すると、受信用ミキサ９に局部発振信号とし
て与えられる送信周波信号ｆアのレベルが過大となり、
受信用ミキサ９における雑音指数が増加し、しかも受信
用ミキサ９で不必要に送信電力が消費されて送信装置と
しての効率が悪いという開通点が生じる。また、受信用
ミキサ９に適宜なレベルで送信周波信号１丁が与えられ
るように送信側１の出力を調整すると、アンテナ７から
所定の送信電力で送信周波信号ｆＴを放射できないとい
う問題点が生じる。(Problem to be Solved by the Invention) In such a configuration, when the output of the transmitting side 1 is increased in order to increase the power of the transmitting side 8 radiated from the antenna 7, one transmitting frequency signal is emitted from the receiving mixer 9. The level of the transmission frequency signal fa given as a local oscillation signal becomes excessive,
The noise figure in the reception mixer 9 increases, and moreover, the transmission power is unnecessarily consumed in the reception mixer 9, resulting in an opening point where the efficiency of the transmission device is poor. Furthermore, if the output of the transmitting side 1 is adjusted so that one transmitting frequency signal is given to the receiving mixer 9 at an appropriate level, a problem arises in that the transmitting frequency signal fT cannot be radiated from the antenna 7 with a predetermined transmitting power. .
そこで、従来の装置では、上記した相反する問題点を考
慮して、不充分ながら適宜な大きさに送信側ｌの出力が
設定されている。Therefore, in conventional devices, the output of the transmitting side l is set to an appropriate, albeit insufficient, magnitude in consideration of the above-mentioned contradictory problems.
本発明の目的は、上記した従来の半二重方式送受信装置
の開通点を解決するためになされたもので、アンテナか
ら放射される送信電力と、受信用ミキサに局部発振信号
として与えられる送信周波信号のレベルとを、ともに最
適値に設定できるようにした半二重方式送受信装置を提
供することにある。An object of the present invention was to solve the above-mentioned problem of the conventional half-duplex transmitting/receiving device. It is an object of the present invention to provide a half-duplex transmission/reception device in which both the signal level and signal level can be set to optimal values.
（問題点を解決するための手段）
かかる目的を達成するために、本発明の半二重方式送受
信装置は、送信周波信号を発生する発振器とアンテナに
接続される分岐回路の一端との間に、前記送信周波信号
を減衰させることなく通過させ前記送信周波信号と周波
数の異なる受信周波信号の通過を阻止する送信側フィル
タを介装し、前記分岐回路の他端と受信用ミキサとの間
に、前記受信周波信号を減衰させることなく通過させ航
記送信周波信号を所定量だけ減衰させて出力する受信側
フィルタを介装して構成されている。(Means for Solving the Problems) In order to achieve the above object, the half-duplex transmitting/receiving device of the present invention provides a half-duplex transmitting/receiving device that connects an oscillator that generates a transmission frequency signal and one end of a branch circuit connected to an antenna. , a transmitting side filter is interposed between the other end of the branch circuit and the receiving mixer, the filter passing the transmitting frequency signal without attenuating it and blocking the passage of the receiving frequency signal having a different frequency from the transmitting frequency signal; , is constructed by interposing a receiving side filter which passes the receiving frequency signal without attenuating it and attenuates the navigation transmitting frequency signal by a predetermined amount and outputs it.
（作用）
アンテナが接続される分岐回路の他端と受信用ミキサと
の間に、受信周波信号を減衰させず送信周波信号を所定
量だけ減衰させて出力する受信側フィルタを介装したの
で、この受信側フィルタで送信周波信号を減衰させる所
定量を調整して、アンテナから放射される送信周波信号
の送信電力に対して、受信用ミキサに局部発掘信号とし
て与えられる送信周波信号のレベルを最適値に設定する
。(Function) A receiving side filter is interposed between the other end of the branch circuit to which the antenna is connected and the receiving mixer, which does not attenuate the receiving frequency signal but attenuates the transmitting frequency signal by a predetermined amount before outputting it. By adjusting the predetermined amount of attenuation of the transmit frequency signal by this receiving side filter, the level of the transmit frequency signal given as a local excavation signal to the receive mixer is optimized with respect to the transmit power of the transmit frequency signal radiated from the antenna. Set to value.
（実施例）
以下本発明の実施例を第１図および第２図を参照して説
明する。第１図は、本発明の半二重方式送受信装置の一
実施例の要部のブロック回路図であり、第２図は、第１
図で用いられる送信側フィルタおよび受信側フィルタの
特性図である。第１図において、第２図と同一回路には
同一符号を付けて重複する説明を省略する。(Example) Examples of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a block circuit diagram of a main part of an embodiment of a half-duplex transmitter/receiver according to the present invention, and FIG.
FIG. 3 is a characteristic diagram of a transmitting side filter and a receiving side filter used in the figure. In FIG. 1, circuits that are the same as those in FIG. 2 are given the same reference numerals and redundant explanations will be omitted.
第１図において、第２図と相違するところは、分岐回路
６の他端と受信用ミキサ９との間に５受信側フイルタ１
１を介装したことにある。そして、この受信側フィルタ
１１の特性は、第２図に実線で示すごとく、受信周波信
号ｆＲを減衰させることなく通過させ、送信周波４８号
ｆＴを所定ｆｉｄだけ減衰させるように設定されている
。なお、送信側フィルタ５の特性は、第２図に破線で示
すごとく、送信周波信号ｆＴを減衰させることなく通道
させ、受信周波１８号ｆＲは通過を阻止するように設定
されている。The difference between FIG. 1 and FIG. 2 is that 5 receiving side filters 1 are connected between the other end of the branch circuit 6 and the receiving mixer 9.
This is due to the fact that 1 was inserted. As shown by the solid line in FIG. 2, the characteristics of the receiving filter 11 are set so that the receiving frequency signal fR is passed through without attenuation, and the transmitting frequency signal fT is attenuated by a predetermined amount fid. The characteristics of the transmitting side filter 5 are set so as to allow the transmitting frequency signal fT to pass through without attenuation, and to prevent the receiving frequency signal fR from passing, as shown by the broken line in FIG.
かかる構成において、送信側１の出力の増大に対して、
受信側フィルタ１１の送信周波信号ｆＴの減衰ｆｆ１ｄ
を適宜に増大させることで、送信周波信号ｆＴを任意の
レベルで受信用ミキサ９に与えることができる。また、
送信側１の出力の減少に対して、受信側フィルタ１１の
減衰量を減少させて受信用ミキサ９に与えられる送信周
波信号ｆＴのレベルが増加するよう調整できる。この結
果、アンテナ７から放射される送信周波１３号ｆＴの送
信電力を適宜に設定するとともに、受信用ミキサ９に与
える送信周波１３号ｆ７のレベルを周波数変換効率の最
も良い値に設定できる。In such a configuration, with respect to an increase in the output of the transmitting side 1,
Attenuation ff1d of the transmission frequency signal fT of the receiving side filter 11
By appropriately increasing fT, the transmission frequency signal fT can be given to the reception mixer 9 at an arbitrary level. Also,
In response to a decrease in the output of the transmitting side 1, the attenuation amount of the receiving side filter 11 can be decreased to increase the level of the transmitting frequency signal fT given to the receiving mixer 9. As a result, the transmission power of the transmission frequency No. 13 fT radiated from the antenna 7 can be set appropriately, and the level of the transmission frequency No. 13 f7 given to the reception mixer 9 can be set to the value with the best frequency conversion efficiency.
なお、上記実施例はマイクロ波およびミリ波の送受信装
置に限られないことは勿論である。It goes without saying that the above embodiments are not limited to microwave and millimeter wave transmitting/receiving devices.
（発明の効果）
以上説明したように、本発明の半二重方式送受信装置は
、受信信号を周波数変換効率良く受信することができ、
しかも受信用ミキサで不必要に送信電力を消費すること
がなく、効率良く送信周波信号を放射することができる
。また、送信周波信号をはさんで受信周波信号と反対側
にある影像周波信号を受信側フィルタで減衰でき、受信
信号の雑音指数を改善することができる。さらに、従来
の装置に対して単に受信側フィルタの追加であり、小型
および低コスト化の容易な半二重方式で性能の優れた送
受信装置を構成することができる。(Effects of the Invention) As explained above, the half-duplex transmitter/receiver of the present invention can receive a received signal with high frequency conversion efficiency.
Furthermore, the receiving mixer does not consume transmission power unnecessarily, and the transmission frequency signal can be efficiently radiated. Furthermore, the image frequency signal on the opposite side of the received frequency signal across the transmitted frequency signal can be attenuated by the receiving side filter, and the noise figure of the received signal can be improved. Furthermore, by simply adding a receiving side filter to a conventional device, it is possible to construct a high-performance transmitting/receiving device using a half-duplex method that is easy to reduce in size and cost.
第１図は、本発明の半二重方式送受信装置の一実施例の
要部のブロック回路図であり、第２図は、第１図で用い
られる送信側フィルタおよび受信側フィルタの特性図で
あり、第３図は、従来の半二重方式送受信装置の要部の
ブロック回路図である。
２：発振器、５：送信側フィルタ、
６：分岐回路、７：アンテナ、
９：受信用ミキサ、１１：受信側フィルタ。FIG. 1 is a block circuit diagram of a main part of an embodiment of a half-duplex transmitter/receiver according to the present invention, and FIG. 2 is a characteristic diagram of a transmitter filter and a receiver filter used in FIG. FIG. 3 is a block circuit diagram of the main parts of a conventional half-duplex transmitter/receiver. 2: Oscillator, 5: Transmission side filter, 6: Branch circuit, 7: Antenna, 9: Reception mixer, 11: Reception side filter.
Claims (1)
分岐回路の一端との間に、前記送信周波信号を減衰させ
ることなく通過させ前記送信周波信号と周波数の異なる
受信周波信号の通過を阻止する送信側フィルタを介装し
、前記分岐回路の他端と受信用ミキサとの間に、前記受
信周波信号を減衰させることなく通過させ前記送信周波
信号を所定量だけ減衰させて出力する受信側フィルタを
介装したことを特徴とする半二重方式送受信装置。A transmitter that transmits the transmission frequency signal between an oscillator that generates the transmission frequency signal and one end of a branch circuit connected to the antenna, allowing the transmission frequency signal to pass without attenuation and blocking the passage of a reception frequency signal having a different frequency from the transmission frequency signal. A receiving side filter is interposed between the other end of the branch circuit and the receiving mixer, and the receiving side filter passes through the receiving frequency signal without attenuating it and outputs the transmitting frequency signal after attenuating it by a predetermined amount. A half-duplex transmission/reception device characterized by an intervening device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27317986A JPS63126328A (en) | 1986-11-17 | 1986-11-17 | Semi-duplex system transmission and reception equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27317986A JPS63126328A (en) | 1986-11-17 | 1986-11-17 | Semi-duplex system transmission and reception equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63126328A true JPS63126328A (en) | 1988-05-30 |
Family
ID=17524199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27317986A Pending JPS63126328A (en) | 1986-11-17 | 1986-11-17 | Semi-duplex system transmission and reception equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63126328A (en) |
-
1986
- 1986-11-17 JP JP27317986A patent/JPS63126328A/en active Pending
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