JPH1075207A - Antenna fault detection circuit - Google Patents
Antenna fault detection circuitInfo
- Publication number
- JPH1075207A JPH1075207A JP8229919A JP22991996A JPH1075207A JP H1075207 A JPH1075207 A JP H1075207A JP 8229919 A JP8229919 A JP 8229919A JP 22991996 A JP22991996 A JP 22991996A JP H1075207 A JPH1075207 A JP H1075207A
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- JP
- Japan
- Prior art keywords
- antenna
- reception
- input
- electric field
- terminal
- 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.)
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- Mobile Radio Communication Systems (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、隣接無線基地局装
置の電界監視用受信機を備えた無線基地局装置のアンテ
ナ故障検出回路に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna failure detection circuit of a radio base station apparatus provided with an electric field monitoring receiver of an adjacent radio base station apparatus.
【0002】[0002]
【従来の技術】従来の移動通信システム、特に日本デジ
タル方式で用いられている無線基地局装置の構成を図4
に示す。この装置は、送受信アンテナ2と、受信専用ア
ンテナ3と、通話チャンネル指定信号を入力とし、その
チャンネル指定信号に対応した所定の周波数によって、
送受信アンテナ2及び受信専用アンテナ3を経由して、
移動体端末9と相互通話する通話用送受信機6と、さら
には、受信専用アンテナ2を経由して、隣接無線基地局
装置8の下り電波状態を監視する下り電界監視用受信機
7より構成されている。その一例としては、特開平03
−268697号公報に開示されている移動無線通信方
式がある。2. Description of the Related Art FIG. 4 shows a configuration of a conventional mobile communication system, in particular, a radio base station apparatus used in the Japanese digital system.
Shown in This apparatus receives a transmission / reception antenna 2, a reception-only antenna 3, and a communication channel designation signal, and receives a signal at a predetermined frequency corresponding to the channel designation signal.
Via the transmitting / receiving antenna 2 and the receiving-only antenna 3,
It comprises a call transceiver 6 for intercommunicating with the mobile terminal 9 and a downstream electric field monitoring receiver 7 for monitoring the downstream radio wave state of the adjacent radio base station device 8 via the reception-only antenna 2. ing. One example is disclosed in
There is a mobile radio communication system disclosed in Japanese Patent No. 268697.
【0003】この無線基地局装置1を用いた無線基地局
システムのゾーン構成例は、図5に示すようになってい
る。例えば、隣接無線ゾーンの隣接無線基地局装置8が
移動体端末16と通信中(この時の回線周波数はf2を
使用)の場合について説明する。まず始めに無線基地局
装置1の下り電界監視用受信機7を起動させ、隣接無線
基地局装置8の下り電波(f2)の電界値を検出し、そ
の周波数の電界値と電波発生率とを測定する。この結果
を考慮して、無線基地局装置1の通話用送受信機6の回
線周波数をダイナミックに決定し、移動体端末16の回
線周波数(f2)と電波干渉を受けないだけの△f以上
の周波数を離した回線周波数(f1)によって、無線区
間通信を行う。[0005] An example of a zone configuration of a wireless base station system using the wireless base station device 1 is as shown in FIG. For example, a case where the adjacent wireless base station device 8 in the adjacent wireless zone is communicating with the mobile terminal 16 (the line frequency at this time uses f2) will be described. First, the downlink electric field monitoring receiver 7 of the radio base station apparatus 1 is activated, the electric field value of the downlink radio wave (f2) of the adjacent radio base station apparatus 8 is detected, and the electric field value of the frequency and the radio wave generation rate are determined. Measure. In consideration of this result, the line frequency of the call transceiver 6 of the radio base station apparatus 1 is dynamically determined, and the line frequency (f2) of the mobile terminal 16 and a frequency of not less than Δf that does not receive radio interference. The wireless section communication is performed using the line frequency (f1) from which.
【0004】このような下り電界監視受信機7を具備し
た無縁基地局装置1のアンテナ故障検出方法としては、
送受信アンテナ2側に、通話用送受信機6の送信電波を
用いて、空間伝搬を利用して受信専用アンテナ3を経由
して、下り電界監視用受信機7にて受信し、入力電界値
の大きさ(以下;RSSIという)によりアンテナ故障
を判断することができることが容易に推定できる。[0004] As a method of detecting an antenna failure of the wireless base station apparatus 1 having such a downlink electric field monitoring receiver 7,
On the transmission / reception antenna 2 side, using the transmission radio wave of the call transmission / reception transceiver 6, the signal is received by the downlink electric field monitoring receiver 7 via the reception-only antenna 3 using spatial propagation, and the magnitude of the input electric field value (Hereinafter, referred to as RSSI), it can be easily estimated that the antenna failure can be determined.
【0005】一方、受信専用アンテナ3側は、試験用送
信機等の外部設備を使用し、受信の有無を判別し、アン
テナ故障を判断することができる。On the other hand, the reception-only antenna 3 can use external equipment such as a test transmitter to determine the presence or absence of reception and determine the antenna failure.
【0006】この一例が特開昭63−269628号公
報に開示されている自動車電話である。One example of this is a car telephone disclosed in Japanese Patent Application Laid-Open No. 63-269628.
【0007】[0007]
【発明が解決しようとする課題】上述した従来の無線基
地局装置のアンテナ故障検出方法としては、送受信アン
テナ側は、通話用送受信機の送信電波を用いて、アンテ
ナ間空間伝搬を利用して受信専用アンテナを経由して、
下り電界監視用受信機にて受信し、入力電界値の大きさ
(以下RSSIと呼ぶ)によりアンテナ故障の判断を行
うことができる。As a method for detecting an antenna failure in the above-mentioned conventional radio base station apparatus, the transmitting and receiving antenna side uses a radio wave transmitted from a telephone transceiver to receive data by utilizing inter-antenna space propagation. Via a dedicated antenna,
Antenna failure can be determined based on the magnitude of the input electric field value (hereinafter, referred to as RSSI) received by the downlink electric field monitoring receiver.
【0008】一方、受信専用アンテナ側は、試験用送信
機等の外部設備を使用して受信し、そのRSSI値の大
きさでアンテナ故障の判断を行うことができる。On the other hand, the reception-only antenna side can receive using an external facility such as a test transmitter, and determine the antenna failure based on the RSSI value.
【0009】従って、各々のアンテナの故障検出手段を
独立に持つ為、無線基地局装置の小型化、低価格化を妨
げるという欠点があった。[0009] Therefore, since the failure detecting means for each antenna is provided independently, there is a drawback that the wireless base station apparatus is prevented from being reduced in size and cost.
【0010】本発明の目的は、送受信アンテナと受信専
用アンテナの故障を一つの検出機能で自立的に検出可能
にしたアンテナ故障検出回路を提供することにある。[0010] It is an object of the present invention to provide an antenna failure detection circuit which can independently detect a failure in a transmitting / receiving antenna and a receiving-only antenna with one detection function.
【0011】[0011]
【課題を解決するための手段】本発明は、無線基地局装
置内で、通話チャンネル指定信号を入力とし、通話チャ
ンネル指定信号に対応した所定の周波数の上り/下り電
波によって、送受信アンテナおよび受信専用アンテナを
経由して、移動体端末と相互通話する通話用送受信機
と、電界監視チャンネル指定信号を入力とし、電界監視
チャンネル指定信号に対応した所定の周波数の下り電波
の状態を監視する下り電界監視用受信機とを具備するア
ンテナ故障検出回路であって、通話用送受信機と送受信
アンテナとの間に直列に接続され、通話用送受信機の下
り電波を第1の端子に入力して低損失で第2の端子を経
由して送受信アンテナに供給し、かつ送受信アンテナよ
り下り電波を第2の端子に入力して低損失で第3の端子
より出力するサーキュレー夕と、サーキュレータを経由
した下り電波を第1の入力端子に入力し、かつ受信専用
アンテナより入力した下り電波を第2の入力端子に入力
し、切替信号にていずれかの入力端子と導通させ出力す
るアンテナ切替スイッチとをさらに具備し、通話用送受
信機の送信電波を下り電界監視用受信機にて受信して、
送受信アンテナ端反射電力および受信専用アンテナの入
力電力により、送受アンテナおよび受信専用アンテナの
故障検出を自立的に行うことを特徴とするアンテナ故障
検出回路である。SUMMARY OF THE INVENTION According to the present invention, a transmission / reception antenna and a reception only reception signal are input to a radio base station apparatus by inputting a speech channel designation signal and transmitting radio waves of a predetermined frequency corresponding to the speech channel designation signal. Downstream electric field monitoring that receives a transceiver for intercommunicating with a mobile terminal via an antenna and an electric field monitoring channel designation signal and monitors the state of a downstream radio wave of a predetermined frequency corresponding to the electric field monitoring channel designation signal An antenna failure detection circuit comprising: a receiver for communication, which is connected in series between a transceiver for communication and a transmission / reception antenna, and inputs a down-stream radio wave of the transceiver for communication to a first terminal to reduce loss. A circuit for supplying to a transmitting / receiving antenna via a second terminal, and for inputting a radio wave going down from the transmitting / receiving antenna to a second terminal and outputting from the third terminal with low loss. A down-wave transmitted through a circulator and a circulator is input to a first input terminal, and a down-wave transmitted from a reception-only antenna is input to a second input terminal. And further comprising an antenna changeover switch for outputting and receiving, and receiving the transmission radio wave of the call transceiver by the downlink electric field monitoring receiver,
An antenna failure detection circuit characterized in that failure detection of a transmission / reception antenna and a reception only antenna is autonomously detected based on reflected power at a transmitting / receiving antenna end and input power of a reception only antenna.
【0012】また、入力電力に対応した入力電界値によ
って、送受信アンテナおよび受信専用アンテナの故障検
出を行うようにすれば好ましい。It is preferable that failure detection of a transmitting / receiving antenna and a receiving antenna is performed based on an input electric field value corresponding to input power.
【0013】さらに、入力電界値として故障時に検出さ
れるべき値を予め設定しておき、実際に測定された入力
電界値が故障時に検出されるべき値に近い場合に故障と
判断すれば好ましい。Further, it is preferable that a value to be detected at the time of a failure is preset as an input electric field value, and that a failure is determined when an actually measured input electric field value is close to a value to be detected at the time of a failure.
【0014】この判断の基準として、実際に測定された
入力電界値が、予め設定された値に対して±1Vである
ときに故障と判断することができる。As a criterion for this determination, a failure can be determined when the actually measured input electric field value is ± 1 V with respect to a preset value.
【0015】[0015]
【発明の実施の形態】本発明の実施例について図面を参
照して説明する。Embodiments of the present invention will be described with reference to the drawings.
【0016】図1は、本発明のアンテナ故障検出回路の
実施例の構成を示すブロック図である。無線基地局装置
1は、送受信アンテナ2および受信専用アンテナ3と、
通話チャンネル指定信号に対応した所定の周波数の上り
/下り電波にて、送受信アンテナ2および受信専用アン
テナ3を経由して、ダイバーシチ機能を有する移動体端
末9と相互通話する通話用送受信機6と、その通話用送
受信機6と送受信アンテナ2との間に直列に接続され、
通話用送受信機6の下り電波を第1の端子11に入力し
て、低損失で第2の端子12を経由して送受信アンテナ
2に供給し、かつ送受信アンテナ2より隣接無線基地局
装置8の0系の下り電波をその第2の端子12に入力し
て、低損失で第3の端子13より出力するサーキュレー
タ4と、そのサーキュレータ4を経由した隣接無線基地
局装置8の0系の下り電波を第1の入力端子14に入力
し、かつ受信専用アンテナ3より入力した隣接無線基地
局装置8の1系の下り電波を第2の入力端子15に入力
し、切替信号にていずれかの入力端子と導通させ出力す
るアンテナ切替スイッチ5と、電界監視チャンネル指定
信号に対応した所定の周波数のアンテナ切替スイッチ5
を経由した隣接基地局装置8の下り電波状態を監視する
下り電界監視用受信機7より構成されている。FIG. 1 is a block diagram showing the configuration of an embodiment of an antenna failure detection circuit according to the present invention. The radio base station device 1 includes a transmitting / receiving antenna 2 and a receiving-only antenna 3,
A call transceiver 6 for intercommunicating with a mobile terminal 9 having a diversity function via a transmission / reception antenna 2 and a reception-only antenna 3 with uplink / downlink radio waves of a predetermined frequency corresponding to a call channel designation signal; It is connected in series between the call transceiver 6 and the transceiver antenna 2,
Downlink radio waves from the call transceiver 6 are input to the first terminal 11 and supplied to the transmission / reception antenna 2 via the second terminal 12 with low loss, and are transmitted from the transmission / reception antenna 2 to the adjacent radio base station device 8. A circulator 4 that inputs a downstream radio wave of system 0 to its second terminal 12 and outputs it from the third terminal 13 with low loss, and a downstream radio wave of system 0 of an adjacent wireless base station device 8 via the circulator 4 Is input to the first input terminal 14, and the downstream radio wave of the first system of the adjacent radio base station device 8 input from the reception-only antenna 3 is input to the second input terminal 15, and any one of the An antenna changeover switch that conducts and outputs a terminal, and an antenna changeover switch having a predetermined frequency corresponding to an electric field monitoring channel designation signal.
It comprises a downstream electric field monitoring receiver 7 for monitoring the downstream radio wave state of the adjacent base station device 8 via the.
【0017】図2は本発明のアンテナ故障検出回路の動
作を説明するための図で、(A)は受信専用アンテナ用
(アンテナ切り替えスイッチは、第2の入力端子側と導
通)で、(B)は送受信用アンテナ用(アンテナ切り替
えスイッチは、第1の入力端子と導通)である。FIGS. 2A and 2B are diagrams for explaining the operation of the antenna failure detection circuit according to the present invention. FIG. 2A is for a reception-only antenna (the antenna switch is electrically connected to the second input terminal side), and FIG. ) Is for a transmitting / receiving antenna (the antenna switch is electrically connected to the first input terminal).
【0018】まず、受信専用アンテナ3の故障検出確認
動作として、通話チャンネル指定信号にて所定の周波数
f1に通話用送受信機6を設定し、一定電力(10dB
m)の下り電波を発射する。同時に、アンテナ切替スイ
ッチ5は切替信号により第2の入力端子15と導通さ
れ、受信専用アンテナ3側に切り替える。次に、下り電
界監視用受信機7は、電界監視チャンネル指定信号にて
f1を受信可能とするように局部発振部をf2に(f2
=f1+1f)設定する。つまり、通話用送受信機6の
下り電波周波数と下り電界監視用受信機7の下り電波監
視周波数とは一致する。従って、電波のループは、通話
用送受信機6とサーキュレータ4と送受信アンテナ2と
受信専用アンテナ3とアンテナ切替スイッチ5と下り電
界監視用受信機7により空間伝搬損失を通して確立す
る。First, as an operation for detecting the failure of the reception-only antenna 3, the communication transceiver 6 is set to a predetermined frequency f1 by a communication channel designation signal, and a constant power (10 dB) is set.
m) is emitted. At the same time, the antenna changeover switch 5 is electrically connected to the second input terminal 15 by the changeover signal, and switches to the reception-only antenna 3 side. Next, the downlink electric field monitoring receiver 7 sets the local oscillation unit to f2 (f2) so that f1 can be received by the electric field monitoring channel designation signal.
= F1 + 1f) is set. That is, the downlink radio frequency of the telephone transceiver 6 and the downlink radio frequency of the downlink electric field monitoring receiver 7 match. Therefore, a loop of radio waves is established through spatial propagation loss by the communication transceiver 6, the circulator 4, the transmission / reception antenna 2, the reception-only antenna 3, the antenna changeover switch 5, and the downlink electric field monitoring receiver 7.
【0019】例えば、図2(A)のモードAに示すよう
に受信専用アンテナ3が、故障していない正常時におい
ては、切替信号にてアンテナ切替スイッチ5は、受信専
用アンテナ3側に導通されていることになり、まず、通
話用送受信機6の下り電波を送受信アンテナ2より一定
電力(10dBm=固定値)を出力すると、受信専用ア
ンテナ3の利得と、あらかじめアンテナ間の物理的距離
が固定であるので、近似的な値のアンテナ間の空間伝搬
損失(−40dB=固定値)とアンテナ切替スイッチ5
の挿入損失(−1dB)の伝送路のみが減衰され、下り
電界監視用受信機7には(10dBm−40dB−1d
B)=−39dBmの電界値が入力され、第3図に示す
ような下り電界監視用受信機7の電界値に対応したRS
SI値(3.0V)を検出する。この結果、あらかじめ
受信アンテナ3が故障時に検出されるべきRSSI値
(1.2V)より極めて高い為、受信専用アンテナ3は
正常と判断される。For example, as shown in the mode A of FIG. 2A, when the reception-only antenna 3 is in a normal state where there is no failure, the antenna changeover switch 5 is conducted to the reception-only antenna 3 by a switching signal. First, when a constant electric power (10 dBm = fixed value) is output from the transmitting / receiving antenna 2 to the downlink radio wave of the telephone transceiver 6, the gain of the receiving antenna 3 and the physical distance between the antennas are fixed in advance. Therefore, the spatial propagation loss between the antennas having an approximate value (−40 dB = fixed value) and the antenna changeover switch 5
Only the transmission line with an insertion loss of (-1 dB) is attenuated, and the receiver 7 for monitoring the downstream electric field (10 dBm-40 dB-1d)
B) An electric field value of −39 dBm is input, and RS corresponding to the electric field value of the downlink electric field monitoring receiver 7 as shown in FIG.
The SI value (3.0 V) is detected. As a result, since the receiving antenna 3 is extremely higher than the RSSI value (1.2 V) to be detected at the time of failure, the receiving-only antenna 3 is determined to be normal.
【0020】また、図2(A)のモードBに示すように
受信専用アンテナ3が折れた等の異常が発生した場合に
おいては、無線基地局装置1の受信専用アンテナ3入力
端のVSWRが無限大取扱注意となっているため、通話
用送受信機6の下り電波は、送受信アンテナ2より一定
電力(10dBm)出力されているが、受信専用アンテ
ナ3が全反射モードとなり、受信専用アンテナ3には所
定の入力電力が供給されず、正常時に比べてアンテナ全
反射量分の約30dB低い電力値(−69dBm)が、
下り電界監視用受信機7に入力され、入力電力値に対応
したRSSI値(1.0V)を検出する。この結果、あ
らかじめ受信専用アンテナ3が故障時に検出されるRS
SI値(1.2V)とほぼ等しいと判断され、受信専用
アンテナ3は異常と判断される。この、故障時に検出さ
れるRSSI値は、受信専用アンテナ3の折れ方や、雨
などの自然環境に影響を受けるため、1.2V±1V位
に設定しておく必要がある。When an abnormality such as breakage of the receiving antenna 3 occurs as shown in mode B of FIG. 2A, the VSWR at the input terminal of the receiving antenna 3 of the radio base station apparatus 1 is infinite. The down radio wave of the call transceiver 6 is output at a constant power (10 dBm) from the transmission / reception antenna 2 due to great care, but the reception antenna 3 is in the total reflection mode, and the reception antenna 3 A predetermined input power is not supplied, and a power value (−69 dBm) about 30 dB lower than the normal state by the total reflection amount of the antenna is obtained.
It is input to the downstream electric field monitoring receiver 7 and detects an RSSI value (1.0 V) corresponding to the input power value. As a result, when the reception-only antenna 3 is
It is determined that it is almost equal to the SI value (1.2 V), and the reception-only antenna 3 is determined to be abnormal. Since the RSSI value detected at the time of failure is affected by how the reception-only antenna 3 is bent or the natural environment such as rain, it is necessary to set the RSSI value to about 1.2V ± 1V.
【0021】一方、送受信アンテナ2の故障検出確認動
作として、切替信号にてアンテナ切替SW5は第1の入
力端子14と導通され、送受信アンテナ2側に切り替わ
っている。つまり、サーキュレータ4側に切り替えて、
通話用送受信機6とサーキュレータ4とアンテナ切替ス
イッチ5と下り電界監視用受信機7により電波のループ
を確立する。On the other hand, as an operation for confirming the failure detection of the transmitting / receiving antenna 2, the antenna switching SW5 is conducted to the first input terminal 14 by the switching signal, and is switched to the transmitting / receiving antenna 2 side. In other words, switching to the circulator 4 side,
A radio wave loop is established by the call transceiver 6, the circulator 4, the antenna changeover switch 5, and the receiver 7 for monitoring a down electric field.
【0022】例えば、図2(B)のモードCに示すよう
に、送受信アンテナ2が、故障していない正常時におい
ては、通話用送受信機6の下り電波(−20dBm)を
出力すると送受信アンテナ2に全ての電力が供給される
ため、反射電力は少なくサーキュレータ4との結合量は
低く(−20dB)なり、アンテナ切替スイッチ5の挿
入損失(−1dB)を経由して伝送路のみ減衰され、下
り電界監視用受信機7に(−20dBm−20dB−1
dB)=−41dBmが入力され、RSSI値(2.8
V)を検出する。この結果、あらかじめ送受信アンテナ
2が故障時に検出されるRSSI値(4.5V)より極
めて低い為、送受信アンテナ2は正常と判断される。For example, as shown in a mode C of FIG. 2B, when the transmitting / receiving antenna 2 outputs a down radio wave (−20 dBm) of the communication transmitter / receiver 6 in a normal state where there is no failure, the transmitting / receiving antenna 2 , The reflected power is small, the coupling amount with the circulator 4 is low (−20 dB), only the transmission path is attenuated via the insertion loss (−1 dB) of the antenna changeover switch 5, and (−20 dBm−20 dB-1)
dB) = − 41 dBm is input, and the RSSI value (2.8) is input.
V) is detected. As a result, since the transmitting / receiving antenna 2 is extremely lower than the RSSI value (4.5 V) detected at the time of failure, the transmitting / receiving antenna 2 is determined to be normal.
【0023】また、図2(B)のモードDに示すよう
に、送受信アンテナ2が折れた等の異常が発生した場合
においては、無線基地局装置1の送受信アンテナ2の入
力端のVSWRが無限大となり、通話用送受信機6の下
り電波(−20dBm)は、送受信アンテナ2に供給さ
れずに、全反射モードとなり、サーキュレータ4の結合
量は減り(−1dB)、アンテナ切替スイッチ5を経由
して、正常時より、約20dB高い電力値が、下り電界
監視用受信機7に(−20dBm−1dB−1dB)=
−22dBmが入力され、RSSI値(4.5V)を検
出する。この結果、あらかじめ送受信アンテナ2が故障
時に検出されるRSSI値(4.5V)と等しいと判断
され、送受信アンテナ2は異常と判断される。As shown in mode D of FIG. 2B, when an abnormality such as a break of the transmitting / receiving antenna 2 occurs, the VSWR at the input end of the transmitting / receiving antenna 2 of the radio base station apparatus 1 is infinite. As a result, the downstream radio wave (−20 dBm) of the communication transceiver 6 is not supplied to the transmission / reception antenna 2 but enters the total reflection mode, and the coupling amount of the circulator 4 decreases (−1 dB). Therefore, a power value that is about 20 dB higher than the normal state is transmitted to the downlink electric field monitoring receiver 7 by (−20 dBm−1 dB−1 dB) =
-22 dBm is input, and the RSSI value (4.5 V) is detected. As a result, it is determined in advance that the transmitting / receiving antenna 2 is equal to the RSSI value (4.5 V) detected at the time of failure, and the transmitting / receiving antenna 2 is determined to be abnormal.
【0024】図3は本発明の下り電界監視用受信機の入
力電力とRSSI特性を示すグラフである。図の点線で
示した送受信アンテナ故障レベル設定値4.5V付近
と、同じく点線で示した受信専用アンテナ故障レベル設
定値1.2V付近で異常が発生する。FIG. 3 is a graph showing the input power and the RSSI characteristic of the receiver for monitoring a down electric field of the present invention. An abnormality occurs near the transmission / reception antenna failure level set value of 4.5 V indicated by the dotted line in the figure and near the reception-only antenna failure level set value of 1.2 V also indicated by the dotted line.
【0025】[0025]
【発明の効果】以上説明したように本発明は、送受信ア
ンテナ及び受信専用アンテナの故障検出を、通話用送受
信機の送信電波を利用して、下り電界監視用受信壊のみ
で判断出来るため、無線基地局装置の小型化、低価格化
に寄与できるという利点がある。As described above, according to the present invention, the failure detection of the transmission / reception antenna and the reception-only antenna can be determined only by the reception failure for monitoring the down electric field using the transmission radio wave of the communication transceiver. There is an advantage that it can contribute to miniaturization and cost reduction of the base station device.
【0026】また、本発明により下り電界監視用受信機
がアンテナ切替ダイバーシチ機能を持てるようになり、
無線基地局装置の下り電界監視用受信機の信頼性の向上
にも寄与できるという利点がある。Further, according to the present invention, the receiver for monitoring a down electric field can have an antenna switching diversity function,
There is an advantage that it can also contribute to improvement in the reliability of the receiver for monitoring the downlink electric field of the wireless base station device.
【図1】本発明のアンテナ故障検出回路を備えた無線基
地局装置の構造を示すブロック図である。FIG. 1 is a block diagram showing the structure of a wireless base station device provided with an antenna failure detection circuit according to the present invention.
【図2】本発明のアンテナ故障回路の動作を説明するた
めの図であり、(A)は受信専用アンテナ用、(B)は
送受信アンテナ用である。FIGS. 2A and 2B are diagrams for explaining the operation of the antenna failure circuit of the present invention, wherein FIG. 2A is for a reception-only antenna and FIG.
【図3】本発明の下り電界監視用受信機の入力電力とR
SSI特性を示すグラフである。FIG. 3 shows the input power and R of the downlink electric field monitoring receiver of the present invention.
5 is a graph showing SSI characteristics.
【図4】従来の無線基地局装置の構造を示すブロック図
である。FIG. 4 is a block diagram showing the structure of a conventional radio base station device.
【図5】無線回線ゾーンの構成を示す図である。FIG. 5 is a diagram showing a configuration of a wireless communication zone.
1 無線基地局装置 2 送受信アンテナ 3 受信専用アンテナ 4 サーキュレータ 5 アンテナ切替スイッチ 6 通話用送受信機 7 下り電界監視用受信機 8 隣接無線基地局装置 9 移動体端末 10 回線ゾーン 11 第1の端子 12 第2の端子 13 第3の端子 14 第1の入力端子 15 第2の入力端子 16 移動体端末 DESCRIPTION OF SYMBOLS 1 Radio base station apparatus 2 Transmission / reception antenna 3 Reception only antenna 4 Circulator 5 Antenna switch 6 Communication transceiver 7 Downstream electric field monitoring receiver 8 Adjacent radio base station apparatus 9 Mobile terminal 10 Line zone 11 First terminal 12 First 2 terminal 13 3rd terminal 14 1st input terminal 15 2nd input terminal 16 Mobile terminal
Claims (4)
信号を入力とし、前記通話チャンネル指定信号に対応し
た所定の周波数の上り/下り電波によって、送受信アン
テナおよび受信専用アンテナを経由して、移動体端末と
相互通話する通話用送受信機と、電界監視チャンネル指
定信号を入力とし、前記電界監視チャンネル指定信号に
対応した所定の周波数の下り電波の状態を監視する下り
電界監視用受信機とを具備するアンテナ故障検出回路に
おいて、 前記通話用送受信機と前記送受信アンテナとの間に直列
に接続され、前記通話用送受信機の下り電波を第1の端
子に入力して低損失で第2の端子を経由して前記送受信
アンテナに供給し、かつ前記送受信アンテナより下り電
波を前記第2の端子に入力して低損失で第3の端子より
出力するサーキュレー夕と、 前記サーキュレータを経由した下り電波を第1の入力端
子に入力し、かつ前記受信専用アンテナより入力した下
り電波を第2の入力端子に入力し、切替信号にていずれ
かの入力端子と導通させ出力するアンテナ切替スイッチ
とをさらに具備し、 前記通話用送受信機の送信電波を前記下り電界監視用受
信機にて受信して、前記送受信アンテナ端反射電力およ
び前記受信専用アンテナの入力電力により、前記送受ア
ンテナおよび受信専用アンテナの故障検出を自立的に行
うことを特徴とするアンテナ故障検出回路。1. A radio base station apparatus which receives a communication channel designating signal as an input, and moves via a transmission / reception antenna and a reception-only antenna by an uplink / downlink radio wave of a predetermined frequency corresponding to the communication channel designation signal. A communication transceiver for intercommunicating with the mobile terminal, and a downlink electric field monitoring receiver that receives an electric field monitoring channel designation signal and monitors the state of a downlink radio wave of a predetermined frequency corresponding to the electric field monitoring channel designation signal. An antenna failure detection circuit that is connected in series between the calling transceiver and the transmitting / receiving antenna, inputs a downstream radio wave of the calling transceiver to a first terminal, and connects a second terminal with low loss to the first terminal. To the transmitting and receiving antenna via the transmitting and receiving antenna, and a radio wave going down from the transmitting and receiving antenna is input to the second terminal and output from the third terminal with low loss. A circulator, inputting a downstream radio wave passing through the circulator to a first input terminal, and inputting a downstream radio wave input from the reception-only antenna to a second input terminal, and using a switching signal to input any one of the input terminals Further comprising: an antenna changeover switch that conducts and outputs a signal. The transmission electric wave of the communication transceiver is received by the receiver for monitoring the down electric field, and the reflected power at the transmission / reception antenna end and the input power of the reception-only antenna. Wherein the failure detection of the transmission / reception antenna and the reception-only antenna is performed autonomously.
て、前記送受信アンテナおよび受信専用アンテナの故障
検出を行うことを特徴とする、請求項1に記載のアンテ
ナ故障検出回路。2. The antenna failure detection circuit according to claim 1, wherein failure detection of said transmission / reception antenna and reception-only antenna is performed based on an input electric field value corresponding to said input power.
べき値を予め設定しておき、実際に測定された入力電界
値が前記故障時に検出されるべき値に近い場合に故障と
判断することを特徴とする、請求項2に記載のアンテナ
故障検出回路。3. A method in which a value to be detected at the time of a failure is preset as the input electric field value, and a failure is determined when the actually measured input electric field value is close to the value to be detected at the time of the failure. The antenna failure detection circuit according to claim 2, wherein:
予め設定された値に対して±1Vであるときに故障と判
断することを特徴とする、請求項2に記載のアンテナ故
障検出回路。4. The antenna failure detection according to claim 2, wherein a failure is determined when the actually measured input electric field value is ± 1 V with respect to the preset value. circuit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8229919A JP2912253B2 (en) | 1996-08-30 | 1996-08-30 | Antenna failure detection circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8229919A JP2912253B2 (en) | 1996-08-30 | 1996-08-30 | Antenna failure detection circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH1075207A true JPH1075207A (en) | 1998-03-17 |
JP2912253B2 JP2912253B2 (en) | 1999-06-28 |
Family
ID=16899802
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8229919A Expired - Fee Related JP2912253B2 (en) | 1996-08-30 | 1996-08-30 | Antenna failure detection circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2912253B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6505041B1 (en) | 1998-10-06 | 2003-01-07 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and an arrangement in a radio system |
JP2010206357A (en) * | 2009-03-02 | 2010-09-16 | Fujitsu Ltd | Radio transmitting and receiving apparatus |
-
1996
- 1996-08-30 JP JP8229919A patent/JP2912253B2/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6505041B1 (en) | 1998-10-06 | 2003-01-07 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and an arrangement in a radio system |
JP2010206357A (en) * | 2009-03-02 | 2010-09-16 | Fujitsu Ltd | Radio transmitting and receiving apparatus |
Also Published As
Publication number | Publication date |
---|---|
JP2912253B2 (en) | 1999-06-28 |
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