JPH04107934U - wireless communication device - Google Patents
wireless communication deviceInfo
- Publication number
- JPH04107934U JPH04107934U JP1871791U JP1871791U JPH04107934U JP H04107934 U JPH04107934 U JP H04107934U JP 1871791 U JP1871791 U JP 1871791U JP 1871791 U JP1871791 U JP 1871791U JP H04107934 U JPH04107934 U JP H04107934U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- attenuator
- wireless communication
- communication device
- receiving
- 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
- 230000007257 malfunction Effects 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 description 14
- 230000002238 attenuated effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229940081330 tena Drugs 0.000 description 1
Landscapes
- Transceivers (AREA)
Abstract
(57)【要約】
【目的】 無線通信機の受信回路系統に設けたアッテネ
−タによって、機器が送信時、送信電力が受信部回路に
漏洩する漏洩電力を減衰させ、また受信時、受信した強
受信電力を減衰させ、受信部回路の回路素子などの破損
や受信部回路動作の不具合を防止することを目的とした
ものである。
【構成】 アンテナ切換回路を切り換えて送信及び受信
することのできる無線通信機の受信回路系統に送受信切
換及び受信信号によって制御されるアッテネ−タを設
け、機器が送信状態の時上記アッテネ−タをON制御し、
受信状態の時は受信信号強度によってアッテネ−タをON
/OFF制御するよう構成したものである。
(57) [Summary] [Purpose] An attenuator installed in the receiving circuit system of a wireless communication device attenuates the leakage power that leaks into the receiving circuit when the device transmits, and also attenuates the leakage power that leaks into the receiving circuit when the device transmits. The purpose is to attenuate strong received power and prevent damage to circuit elements of the receiver circuit and malfunction of the receiver circuit. [Structure] An attenuator controlled by the transmit/receive switch and the received signal is provided in the receiving circuit system of a wireless communication device that can transmit and receive by switching the antenna switching circuit, and the attenuator is controlled by the transmit/receive switch and the received signal. ON control,
During reception, attenuator is turned on depending on the received signal strength.
/OFF control is configured.
Description
【０００１】0001
この考案は無線通信機の送受信に係り、特に送信時の受信部回路への電力漏洩 を低減するのに好適な無線通信機に関する。 This idea is related to the transmission and reception of wireless communication devices, and is particularly designed to prevent power leakage to the receiving circuit during transmission. The present invention relates to a wireless communication device suitable for reducing.
【０００２】0002
従来の無線通信機の送受信切換回路は図２のブロック図に示すものが多く提供 されていた。図において、１は無線通信機の送信部回路、３は送受信切換のアン テナ切換回路、４は送受信アンテナ、５は無線通信機の受信部回路である。 Many of the transmission/reception switching circuits of conventional wireless communication devices are shown in the block diagram in Figure 2. It had been. In the figure, 1 is the transmitter circuit of the wireless communication device, and 3 is the transmission/reception switching amplifier. 4 is a transmitting/receiving antenna, and 5 is a receiving section circuit of a wireless communication device.
【０００３】 無線通信機が送信状態に設定されると、送信部回路１からの送信出力信号はア ンテナ切換回路３を介して送受信アンテナ４より送信される。即ち、アンテナ切 換回路３は送信部回路１の出力信号を送受信アンテナ４に供給するよう送信側に 切り換えられ、受信部回路５の受信動作はできない状態になる。0003 When the wireless communication device is set to transmit state, the transmission output signal from transmitter circuit 1 is activated. The signal is transmitted from the transmitting/receiving antenna 4 via the antenna switching circuit 3. In other words, the antenna is turned off. The converter circuit 3 is connected to the transmitter side so as to supply the output signal of the transmitter circuit 1 to the transmitter/receiver antenna 4. The receiving circuit 5 is switched to a state in which receiving operation is disabled.
【０００４】 一方、無線通信機が受信状態に設定されると、アンテナ切換回路３は受信側に 切り換わって送受信アンテナ４からの受信信号が受信部回路５に供給され受信す ることができる。0004 On the other hand, when the wireless communication device is set to the receiving state, the antenna switching circuit 3 is switched to the receiving side. After switching, the received signal from the transmitting/receiving antenna 4 is supplied to the receiving section circuit 5 and is received. can be done.
【０００５】[0005]
しかし、上記した従来の無線通信機は送信時の送信電力が異常負荷の時、この 送信電力の一部がアンテナ切換回路３などから受信部回路５に漏洩し、例えば受 信部回路５の初段の高周波増幅回路又は周波数変換回路などの回路素子を破損す ることがあるという欠点があった。 However, when the above-mentioned conventional wireless communication equipment has an abnormal load on the transmission power during transmission, A part of the transmission power leaks from the antenna switching circuit 3 etc. to the receiving section circuit 5, for example. damage to circuit elements such as the first-stage high-frequency amplification circuit or frequency conversion circuit of the communication circuit 5. There was a drawback that sometimes.
【０００６】 この考案は上記した点に鑑みてなされたものであり、その目的とするところは 従来例の欠点を解消し、受信回路系統にアッテネ−タを設け、無線通信機の送信 時の送信電力が受信部回路へ漏洩する漏洩電力を減衰させることができ、また受 信時は受信信号強度によってアッテネ−タを制御することができる無線通信機を 提供するところにある。[0006] This idea was made in view of the above points, and its purpose is to Eliminating the drawbacks of the conventional example, an attenuator is installed in the receiving circuit system, and the transmitter of the wireless communication device is It is possible to attenuate the leakage power that leaks to the receiver circuit, and also to When transmitting, use a wireless communication device that can control the attenuator depending on the strength of the received signal. It's there to provide.
【０００７】[0007]
この考案の無線通信機はアンテナ切換回路を切り換えて送信及び受信すること のできる無線通信機において、受信回路系統に送受信切換と受信信号によって制 御されるアッテネ−タを設け、機器が送信状態の時上記アッテネ−タをON制御し 、受信状態の時は受信信号強度によってアッテネ−タをON/OFF制御するよう構成 したものである。 The wireless communication device of this invention can transmit and receive by switching the antenna switching circuit. In wireless communication equipment capable of A controlled attenuator is provided, and the attenuator is turned on when the device is in the transmitting state. , is configured to control the attenuator on/off depending on the strength of the received signal during reception. This is what I did.
【０００８】[0008]
この考案によれば、送受信切換回路を有する無線通信機の受信回路系統に送受 信切換及び受信信号によって制御されるアッテネ−タを設け、無線通信機が送信 状態に設定されると送信部回路からの送信電力はアンテナ切換回路を介して送受 信アンテナに供給され、この送信状態時の上記アッテネ−タはON制御されて最大 限の信号減衰をするよう動作する。 According to this invention, the transmitter/receiver is connected to the receiver circuit system of a radio communication device having a transmitter/receiver switching circuit. An attenuator is provided that is controlled by the signal switching and received signals, and the wireless communication device transmits. When set to the state, the transmission power from the transmitter circuit is sent and received via the antenna switching circuit. The attenuator is supplied to the transmitting antenna, and the above attenuator is controlled to be on at maximum during this transmitting state. It operates to attenuate the signal as much as possible.
【０００９】 即ち、送信部回路からの送信電力がアンテナ切換回路などを介して上記受信回 路系統に漏洩する場合、この漏洩電力はアッテネ−タによって減衰し、受信部回 路に漏洩する漏洩電力を低減することができ、この漏洩電力のよる受信部回路の 回路素子の破損などを防止することができる。[0009] In other words, the transmission power from the transmitter circuit is transferred to the receiver circuit via the antenna switching circuit, etc. If it leaks into the power grid, this leakage power is attenuated by an attenuator and the receiver circuit is It is possible to reduce the leakage power that leaks into the receiver circuit due to this leakage power. Damage to circuit elements can be prevented.
【００１０】 また、無線通信機が受信状態に設定されると、上記アッテネ−タは受信信号の 強度によってON/OFF制御される。即ち、受信信号が強電力受信時はこの強受信電 力を検出して CPUでアッテネ−タをON制御し、受信部回路５の受信電力による混 変調などの不具合を無くすよう受信電力を減衰させ、また、受信信号が弱電力受 信時はアッテネ−タが OFF制御されて受信信号を減衰することなく受信すること ができる。0010 Also, when the wireless communication device is set to receive state, the above attenuator ON/OFF control depending on intensity. In other words, when the received signal is received with strong power, this strong received power The power is detected and the attenuator is turned on by the CPU to prevent interference caused by the received power in the receiver circuit 5. The received power is attenuated to eliminate problems such as modulation, and the received signal is When receiving a signal, the attenuator is turned off so that the received signal is received without attenuation. I can do it.
【００１１】[0011]
この考案に係る無線通信機の実施例を図１のブロック図に基づいて説明する。 なお従来例と同一部分には同一符号を付してその説明を省略する。 An embodiment of the wireless communication device according to this invention will be described based on the block diagram of FIG. Note that the same parts as in the conventional example are given the same reference numerals, and the explanation thereof will be omitted.
【００１２】 図において、２は送信部回路１の終段の送信高周波増幅回路、６は無線通信機 に内蔵して各部回路を制御する CPU、７は受信部回路５の初段の受信高周波増幅 回路、８は受信回路系統に設けたアッテネ−タである。0012 In the figure, 2 is a transmission high frequency amplifier circuit at the final stage of the transmitter circuit 1, and 6 is a wireless communication device. A CPU is built in to control each circuit, and 7 is a reception high-frequency amplification at the first stage of the reception circuit 5. The circuit 8 is an attenuator provided in the receiving circuit system.
【００１３】 送信部回路１と受信部回路５とを有した無線通信機が送信モードに設定させる と、送信部回路１の送信信号は終段の送信高周波増幅回路２で電力増幅されアン テナ切換回路３を介して送受信アンテナ４に供給され送信することができる。[0013] A wireless communication device having a transmitter circuit 1 and a receiver circuit 5 is set to transmit mode. Then, the transmission signal from the transmitter circuit 1 is power amplified by the final stage transmitter high frequency amplifier circuit 2 and then output to the amplifier. The signal is supplied to the transmitting/receiving antenna 4 via the antenna switching circuit 3 and can be transmitted.
【００１４】 一方、無線通信機が受信モードに切り換えられると、上記アンテナ切換回路３ は受信側に切り換えられ、無線通信機は送受信アンテナ４からの受信信号をアン テナ切換回路３及びアッテネ−タ８を介して受信部回路５の初段受信高周波増幅 回路７に供給して受信することができる。[0014] On the other hand, when the wireless communication device is switched to reception mode, the antenna switching circuit 3 is switched to the receiving side, and the wireless communication device unblocks the received signal from the transmitting/receiving antenna 4. First-stage reception high-frequency amplification of the receiver circuit 5 via the tena switching circuit 3 and the attenuator 8 It can be supplied to the circuit 7 and received.
【００１５】 この様に、無線通信機の送受信モードの切り換えによって、内蔵の CPU６は送 受信モードの設定状態を判断してアッテネ−タ８をON/OFF制御する。即ち、無線 通信機が送信モードに設定されるとアッテネ−タ８はON状態になって受信回路系 統への供給信号を減衰する。[0015] In this way, by switching the transmit/receive mode of the wireless communication device, the built-in CPU 6 The attenuator 8 is controlled ON/OFF by determining the reception mode setting state. That is, wireless When the communication device is set to transmit mode, attenuator 8 is turned on and the receiver circuit system is turned on. Attenuates the signal supplied to the system.
【００１６】 一方、無線通信機が受信モードに設定されると、無線通信機は送受信アンテナ ４に受信した受信信号強度を検出して CPU６はアッテネ−タ８をON/OFF制御する 。即ち、強電力受信時は受信部回路５の混変調などの不具合を無くすようアッテ ネ−タをON制御して受信電力を減衰させ、また、受信信号が弱電力受信時はアッ テネ−タを OFF制御して受信信号の減衰を無くして受信することができる。[0016] On the other hand, when the radio transmitter is set to receive mode, the radio transmitter uses the transmitting and receiving antennas. CPU 6 detects the strength of the received signal received at 4 and controls attenuator 8 on/off. . In other words, when receiving strong power, attenuation is applied to eliminate problems such as cross modulation in the receiver circuit 5. The received power is attenuated by controlling the power output on the By controlling the tenator to OFF, the received signal can be received without attenuation.
【００１７】 この様に構成した無線通信機が送信状態時、送信電力が異常負荷によって受信 回路系統に大きく電力漏洩する場合、受信回路系統のアッテネ−タ８がON制御さ れているため、上記漏洩電力は減衰して受信部回路５の受信高周波増幅回路７に 加わる漏洩電力を低減することができ、漏洩電力による受信部回路５の不具合や 回路素子の破損などの悪影響を防止することができる。[0017] When the wireless communication device configured in this way is in the transmitting state, the transmitted power may be reduced due to an abnormal load. If there is a large amount of power leaking into the circuit system, attenuator 8 of the receiving circuit system will be turned ON. Therefore, the leakage power is attenuated and transmitted to the receiving high frequency amplifier circuit 7 of the receiving section circuit 5. It is possible to reduce the leakage power that is applied, and prevent malfunctions in the receiver circuit 5 due to leakage power. Adverse effects such as damage to circuit elements can be prevented.
【００１８】 また、上記アッテネ−タ８のON/OFF制御は、特に CPU６制御回路を内蔵してい ない機器、又は CPU６制御回路を有していても、この CPU６制御動作で処理せず 送信部回路１の供給電源で動作するOR回路で構成したアッテネ−タ８駆動回路で 制御することも可能である。[0018] In addition, the ON/OFF control of the above attenuator 8 is especially possible because the CPU 6 control circuit is built in. Even if the device has a CPU6 control circuit, it will not be processed by this CPU6 control operation. The attenuator 8 drive circuit consists of an OR circuit that operates on the power supply of the transmitter circuit 1. It is also possible to control.
【００１９】 更に上記アッテネ−タ８のON/OFF制御は、送信出力電力がハイパワー時にアッ テネ−タ８がONになり、送信出力電力がローパワー時は OFFになるようアッテネ −タ８制御しても良い。[0019] Furthermore, the ON/OFF control of the above attenuator 8 is performed when the transmission output power is high. Attenuate so that tenator 8 is turned on and turned off when the transmitting output power is low power. - It is also possible to control the data by 8.
【００２０】[0020]
この考案に係る無線通信機の送受信モードによる受信回路系統に設けたアッテ ネ−タのON/OFF制御は前述のように、送信時に受信部回路に漏洩する漏洩電力を 減衰させることができるので、受信部回路の初段の受信高周波増幅回路などの回 路素子が破損することを未然に防止することができるという効果がある。 Attenuation provided in the receiving circuit system according to the transmitting/receiving mode of the wireless communication device according to this invention As mentioned above, the ON/OFF control of the generator is to reduce the leakage power that leaks into the receiver circuit during transmission. Because it can be attenuated, it can be used in circuits such as the first-stage reception high-frequency amplifier circuit This has the effect of being able to prevent the path element from being damaged.
【００２１】 また、受信モードの受信電力の強度によってアッテネ−タをON/OFF制御するこ とができるので、強受信電力による受信部回路の不具合を防止することもできる という効果もある。[0021] Also, the attenuator can be controlled ON/OFF depending on the strength of the received power in the receive mode. It is also possible to prevent malfunctions in the receiver circuit due to strong received power. There is also this effect.
【００２２】 しかも、構造が簡単であって、また、安価に構成することができるため実施 も容易であるなどの優れた特長を有している。[0022] Moreover, it has a simple structure and can be constructed at low cost. It has excellent features such as being easy to use.
【図１】この考案の無線通信機の実施例を示した構成ブ
ロック図である。FIG. 1 is a configuration block diagram showing an embodiment of a wireless communication device of this invention.
【図２】従来例を示したブロック図である。FIG. 2 is a block diagram showing a conventional example.
１ 無線通信機の送信部回路 ２ 送信部回路の終段高周波増幅回路 ３ アンテナ切換回路 ４ 送受信アンテナ ５ 無線通信機の受信部回路 ６ 受信部回路の CPU ７ 受信部回路の初段高周波増幅回路 ８ 受信回路系統に設けたアッテネ−タ 1 Transmitter circuit of wireless communication device 2 Final stage high frequency amplifier circuit of transmitter circuit 3 Antenna switching circuit 4 Transmitting/receiving antenna 5 Receiver circuit of wireless communication device 6 CPU of receiver circuit 7 First-stage high-frequency amplifier circuit of receiver circuit 8 Attenuator installed in the receiving circuit system
Claims (1)
受信することのできる無線通信機において、受信回路系
統に送受信切換と受信信号によって制御されるアッテネ
−タを設け、機器が送信状態の時上記アッテネ−タをON
制御し、受信状態の時は受信信号強度によってアッテネ
−タをON/OFF制御するよう構成したことを特徴とする無
線通信機。Claim 1: A radio communication device capable of transmitting and receiving by switching an antenna switching circuit, wherein the receiving circuit system is provided with an attenuator controlled by the transmitting/receiving switching and the received signal, and when the device is in the transmitting state, the attenuator is -Turn on the
1. A wireless communication device characterized in that the attenuator is controlled on and off depending on the received signal strength when in a receiving state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1871791U JPH04107934U (en) | 1991-03-04 | 1991-03-04 | wireless communication device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1871791U JPH04107934U (en) | 1991-03-04 | 1991-03-04 | wireless communication device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04107934U true JPH04107934U (en) | 1992-09-17 |
Family
ID=31905171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1871791U Pending JPH04107934U (en) | 1991-03-04 | 1991-03-04 | wireless communication device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04107934U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0730461A (en) * | 1993-07-14 | 1995-01-31 | Nec Corp | Transmitter-receiver for testing automobile telephone system |
| JP2005253044A (en) * | 2003-11-27 | 2005-09-15 | Kobe Steel Ltd | Wireless communications apparatus |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5894245A (en) * | 1981-11-30 | 1983-06-04 | Mitsubishi Electric Corp | Radio transmitter and receiver |
-
1991
- 1991-03-04 JP JP1871791U patent/JPH04107934U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5894245A (en) * | 1981-11-30 | 1983-06-04 | Mitsubishi Electric Corp | Radio transmitter and receiver |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0730461A (en) * | 1993-07-14 | 1995-01-31 | Nec Corp | Transmitter-receiver for testing automobile telephone system |
| JP2005253044A (en) * | 2003-11-27 | 2005-09-15 | Kobe Steel Ltd | Wireless communications apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100353313B1 (en) | Method and apparatus for enhancing transmitter circuit efficiency of mobile radio units | |
| JPH09162773A (en) | Radio transmitter-receiver with consumed current reduction function | |
| JPH04107934U (en) | wireless communication device | |
| JPH05315994A (en) | Radio equipment to be shared by transmission and reception | |
| KR100538452B1 (en) | Time division duplexing communication system and controlling method of automatic gain thereof | |
| KR100695398B1 (en) | Radio end unit of time division duplexing wireless transmitter | |
| JP7655057B2 (en) | Amplification equipment | |
| JPH10336068A (en) | Wireless communication equipment | |
| CN100380828C (en) | Radio receiving and transmitting system capable of dynamically adjusting working bias point of low noise amplifier | |
| US6687490B2 (en) | Transmission apparatus and method for a mobile communication terminal | |
| KR100318480B1 (en) | Mobile communication terminal with dynamic output level | |
| KR100303787B1 (en) | Power booster circuit of potable terminal | |
| JP3646906B2 (en) | Wireless repeater amplifier | |
| JPH08340274A (en) | Portable radio equipment | |
| KR100689536B1 (en) | Transmitter to reduce current consumption in mobile communication system | |
| JP2003209476A (en) | Communication terminal and its control circuit | |
| JPH0520019Y2 (en) | ||
| KR100301020B1 (en) | Transmission apparatus of dual mode communication device | |
| JPH07336260A (en) | Power consumption reduction circuit | |
| JP2635651B2 (en) | Space diversity receiver | |
| KR20000013423U (en) | Low power consumption mobile communication terminal | |
| KR20060095363A (en) | Transmission device of mobile communication terminal | |
| JPS6313525A (en) | Portable radio equipment | |
| JPH06303154A (en) | Transmission power control system in transmitter | |
| JPH0279518A (en) | Hot standby switching system |