JP2008153984A - Reception diversity circuit - Google Patents

Reception diversity circuit Download PDF

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JP2008153984A
JP2008153984A JP2006340308A JP2006340308A JP2008153984A JP 2008153984 A JP2008153984 A JP 2008153984A JP 2006340308 A JP2006340308 A JP 2006340308A JP 2006340308 A JP2006340308 A JP 2006340308A JP 2008153984 A JP2008153984 A JP 2008153984A
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frequency band
radio frequency
receiving
antenna
transmitting
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JP4765924B2 (en
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Shokichi Oshiro
将吉 大城
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Nec Corp
日本電気株式会社
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Abstract

<P>PROBLEM TO BE SOLVED: To achieve a reception diversity circuit having a changeover function of a transmission antenna with a relatively simple configuration. <P>SOLUTION: A transmission/reception circuit uses operating frequency bands f1, f2. In a signal processing process, a frequency band having a satisfactory reception state is determined, and single-pole double-throw frequency band change-over switches 3, 4 are changed so that a determined frequency band having a satisfactory reception state is used for transmission and reception. An antenna having a satisfactory reception state is determined from antennas 1, 2, the antenna, where the determined reception state is satisfactory, is used for transmission and reception, and the antenna, where the reception state is unsatisfactory, is set to be a subantenna exclusive for reception. According to the setting processing, a transmission frequency band transmitted from a transmission section 20 is selected, and the changeover control is performed to single-pole double-throw frequency band change-over switches 9, 10. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、自動車電話、携帯電話などの移動通信可能な無線端末装置に好適なダイバーシティー回路に関し、特に複数の無線周波数帯を使用することによってダイバーシティー通信可能な構成を備えた無線端末装置に関する。 The present invention is an automobile telephone, relates preferred diversity circuit in the mobile communicable wireless terminal devices such as cellular phones, a wireless terminal apparatus having a diversity communicable constructed by particularly using a plurality of radio frequency bands .

移動通信を行う無線端末装置におけるデータ受信のスループットを上げるために、受信ダイバーシティーのニーズが高まっている。 To increase the throughput of data reception in the wireless terminal device that performs mobile communication, there is an increasing need for the reception diversity. 更に受信状態が悪い時の送信電力を抑えるために、サブアンテナを備える要求が高まっている。 In order to further reduce the transmission power when a bad reception state, there is an increasing demand with the sub-antenna.

例えば特許文献1では、第1および第2の送受信アンテナと、第1の無線周波数帯の送受信手段と、第2の無線周波数帯の送受信手段と、第1の無線周波数帯の受信手段と、第2の無線周波数帯の受信手段と、前記第1の送受信アンテナを、前記第1の無線周波数帯の送受信手段、または前記第2の無線周波数帯の受信手段のいずれか一方に接続する第1のアンテナ切替えスイッチと、前記第2の送受信アンテナ2を、前記第2の無線周波数帯の送受信手段、または前記第1の無線周波数帯の受信手段のいずれか一方に接続する第2のアンテナ切替えスイッチを備え、前記第1または第2の無線周波数帯のうち、いずれか受信状態が良好な方を選択して通信を行うことにより通話品質の向上を図っている。 For example, Patent Document 1, first and second transmitting and receiving antenna, a transmitting and receiving means of the first radio frequency band, and transmitting and receiving means of the second radio frequency band, receiving means of the first radio frequency band, the receiving means 2 of the radio frequency band, wherein the first reception antenna, the first radio frequency band of the transmitting and receiving means or the first to be connected to one of said second radio frequency band of the receiving means, an antenna changeover switch, said second transmitting and receiving antenna 2, the second radio frequency band of the receiving means or the second antenna changeover switch which connects to one of the receiving means of the first radio frequency band, comprising, one of the first or second radio frequency band, or receiving state is to improve the call quality by communicating to select whichever better.

この特許文献1に記載の発明では、受信待機時等に、第1のアンテナ切替えスイッチにより第1の送受信アンテナを前記第1の無線周波数帯の送受信手段と接続し、第2のアンテナ切替えスイッチにより第2の送受信アンテナを前記第2の無線周波数帯の送受信手段と接続して、基地局側から前記第1および第2の無線周波数帯で送信される同じ内容の信号を同時に受信し、それぞれの復調出力におけるエラーレート等を比較して受信状態が良好な一方の無線周波数帯を選択し、その後の受信信号処理を行うことにより、周波数ダイバーシティー受信が実行される。 In the invention described in Patent Document 1, the reception standby mode or the like, the first antenna changeover switch a first transceiver antenna connected to the first radio frequency band of the transmitting and receiving means, the second antenna changeover switch a second receiving antenna connected with the second radio frequency band of the receiving means receives a signal having the same content transmitted by said first and second radio frequency band from the base station side at the same time, each received by comparing the error rate or the like condition to select the good one radio frequency band in the demodulation output, by performing the subsequent reception signal processing, frequency diversity reception is performed.

上記比較で、例えば第1の無線周波数帯における受信状態の方が良好と判断された場合には、第1のアンテナ切替えスイッチは前記第1の送受信アンテナを前記第1の無線周波数帯の送受信手段と接続した状態を維持することにより前記第1の無線周波数帯の受信主チャネル経路が構成され、一方、第2のアンテナ切替えスイッチは、前記第2の送受信アンテナを前記第2の無線周波数帯の送受信手段から前記第1の無線周波数帯の受信手段に切替え接続され、第1の無線周波数帯の受信副チャネル経路が構成される。 In the comparison, for example, when the better reception state at the first radio frequency band is determined to be good, the first antenna changeover switch said first said transmitting and receiving antenna of the first radio frequency band of the transmitting and receiving means reception main channel path of the first radio frequency band is configured by maintaining the state of being connected to, on the other hand, the second antenna changeover switch, said second transmitting and receiving antenna of the second radio frequency band connected switching to the receiving means of the first radio frequency band from the transmitting and receiving means, receiving the sub-channel path of the first radio frequency band is configured.

これら第1の無線周波数帯の受信主チャネル経路と受信副チャネル経路で信号処理された復調信号におけるエラーレート等が更に比較され、第1の無線周波数帯の受信主チャネル経路と受信副チャネル経路のいずれか受信状態の良い方の信号を選択することにより、アンテナダイバーシティー受信が実行される構成となっている。 These like the first error rate in the received main channel path and the received signal processed demodulated signal in the secondary channel path radio frequency band is further compared, the received sub-channel path and a receiving main channel path of the first radio frequency band by selecting the better signal from one reception state, it has a structure in which antenna diversity reception is performed.

また、特許文献2には、対象とする周波数帯がそれぞれ異なる複数のアンテナと、前記周波数帯に対応した複数の送受信回路と、前記周波数帯のうちの所定の周波数帯で通信を行う場合、該使用する周波数帯に対応する送受信回路の送信回路は当該使用する周波数帯に対応するアンテナのみと接続し、使用する周波数帯に対応する送受信回路の受信回路は当該使用する周波数帯に対応するアンテナと他のアンテナとを接続する制御手段と、前記受信回路の各出力を合成ダイバーシティー処理する処理手段とを備えた受信ダイバーシティー回路が記載されている。 Further, Patent Document 2, when the frequency band of interest is performed a plurality of antennas having different respective plurality of reception circuits corresponding to the frequency band, the communication at a predetermined frequency band of said frequency band, the transmitter circuit of the transceiver circuit corresponding to the frequency band used is only connected to the antenna corresponding to the frequency band to be the use, the receiving circuit of the transmitting and receiving circuits corresponding to the frequency band to be used with an antenna corresponding to the frequency band to be the use and control means for connecting the other antenna, the reception diversity circuit and a processing means for synthesizing diversity processing each output of the receiving circuit is described.

特開平7−221684号公報 JP-7-221684 discloses 特開2005−347791号公報 JP 2005-347791 JP

上記特許文献1に記載の発明では、受信経路については、受信状態の良い方の無線周波数帯およびアンテナを選択可能であるが、送信経路については、受信状態の良い無線周波数帯が選択されるものの、送信用アンテナは無線周波数帯毎に固定されているので、受信状態の良いアンテナが必ずしも送信アンテナとして選択されるとは限らないという問題がある。 In the invention described in Patent Document 1, for the receive path, but the radio frequency band and the antenna of the better receiving status is selectable, for the transmit path, although good reception state radio frequency band is selected , transmitting antennas are fixed to each radio frequency band, there is a problem that not necessarily good reception state antenna is always selected as the transmitting antenna.

携帯電話機等の移動通信用無線端末装置の場合、実装上の体積的な制約から、端末を折り畳んだり、展開したり、又は手の持ち方によってアンテナの特性が変化してしまうことがあり、そのため送信アンテナも選択して切替え可能な構成とすることが望ましいが、特許文献1記載の発明において、アンテナ切替えスイッチに送信アンテナの切替え機能も持たせようとすると、アンテナ切替えスイッチとして、複雑で高機能のアンテナスイッチが必要となる。 In the mobile phone mobile communication radio terminal device such as, from the volume constraints on implementation, folded the terminal, it may expand or, or by way of holding the hand characteristics of the antenna is changed, therefore Although it is desirable that the transmitting antenna is also capable of switching to select a configuration, in the invention of Patent Document 1, when an attempt also have switching function of transmitting antennas to the antenna changeover switch, as an antenna changeover switch, complex and sophisticated It is required of the antenna switch.

また、特許文献2に記載の発明では、対象とする周波数帯がそれぞれ異なる複数のアンテナを用いているため、送信については周波数帯毎に専用のアンテナが用いられる。 Further, in the invention described in Patent Document 2, since the frequency band of interest is using a different plurality of antennas respectively dedicated antenna is used for each frequency band for transmission. そのため、使用周波数帯が決まると送信アンテナは自動的に決まってしまい、受信状態の良いアンテナを選択して切替える手段を備えるものではない。 Therefore, a transmission antenna used frequency band is determined is cause determined automatically and does not comprise means for switching to select a good reception condition antenna.

図4は、上記従来技術において、アンテナ切替えスイッチに送信アンテナの切替え機能も持たせた場合に想定される受信ダイバーシティー回路を示す要部ブロック図である。 4, in the prior art, is a principal block diagram showing a receiver diversity circuit which is assumed when allowed also have switching function of transmitting antennas to the antenna changeover switch.

図4において、1、2は、無線周波数帯f1及びf2の双方で使用できる送受信アンテナであり、40は、無線周波数帯f1及びf2の双方において使用する送受信アンテナを随時切替え可能にする2×4接点型アンテナ切替えスイッチである。 4, 1 and 2, a transmitting and receiving antenna which can be used in both the radio frequency bands f1 and f2, 40 is 2 × 4 that allows switching the transmitting and receiving antennas to use in both radio frequency bands f1 and f2 optionally it is a contact type antenna changeover switch. 5は、無線周波数帯f1において、受信時には受信周波数帯付近のみを通過させ送信時には送信周波数帯付近のみを通過させるフィルタを持つアンテナ共用器、6は、無線周波数帯f2において、受信時には受信周波数帯付近のみを通過させ送信時には送信周波数帯付近のみを通過させるフィルタを持つアンテナ共用器である。 5, in the radio frequency band f1, the antenna duplexer at the time of transmission is with a filter which passes only near the transmission frequency band upon reception passes only near the reception frequency band, 6 is the radio frequency band f2, at the time of receiving the reception frequency band at the time of transmission is passed through the vicinity of only an antenna duplexer having a filter which passes only near the transmission frequency band.

41は、無線周波数帯f1において受信周波数帯付近のみを通過させる受信部フィルタ、42は、無線周波数帯f2において受信周波数帯付近のみを通過させる受信部フィルタである。 41 includes a receiver filter, which passes only near the reception frequency band in the radio frequency band f1 42 is a receiving unit filter which passes only near the reception frequency band in the radio frequency band f2. 11,12はアイソレータ、13,17は、受信周波数帯f1を増幅するローノイズアンプ、14,18は、受信周波数帯f2を増幅するローノイズアンプ、15は、送信周波数帯f1を増幅するパワーアンプ、16は、送信周波数帯f2を増幅するパワーアンプである。 11 and 12 isolators, 13 and 17, low noise amplifier for amplifying a received frequency band f1, 14, 18 is a low noise amplifier for amplifying a received frequency band f2, a power amplifier 15, which amplifies the transmission frequency band f1, 16 is a power amplifier for amplifying a transmission frequency band f2. また、19,21は、受信した無線周波数帯f1またはf2の信号からベースバンド信号を復調する受信部、20は、送信周波数f1またはf2をベースバンド信号で変調した信号をパワーアンプ15または16へ出力する送信部、22は、ベースバンド信号を処理するベースバンド部である。 Also, 19 and 21, the receiving unit for demodulating a baseband signal from the radio frequency signals f1 or f2 received, 20 the transmission frequencies f1 or f2 of the modulated signal in the base band signal to the power amplifier 15 or 16 transmitting unit for outputting, 22 is a baseband section for processing baseband signals.

次に、図4に示す受信ダイバーシティー回路の動作について説明する。 Next, the operation of the receiver diversity circuit shown in FIG.

受信待機時等には、まず、アンテナ切替えスイッチ40の接点Aを接点Bと接続し、接点Dを接点Cと接続することにより、送受信アンテナ1及び2で、基地局側から無線周波数帯f1およびf2で送信される同じ内容の信号を同時に受信し、それぞれの復調出力におけるエラーレート等を検出し、次に、アンテナ切替えスイッチ40の接点Aを接点Cと接続し、接点Dを接点Bと接続することにより、同様にエラーレート等を検出し、これらの検出結果に基づいて受信状態が良好な一方の無線周波数帯を選択する。 The reception standby or the like, first, connect the contact A of the antenna changeover switch 40 to the contact B, by connecting the contact point D between the contact C, and the transmitting and receiving antennas 1 and 2, the radio frequency band f1 and the base station side simultaneously received signals of the same content to be sent by f2, detects an error rate and the like in each of the demodulated output, then the contact point a of the antenna changeover switch 40 is connected to the contact point C, connected to the contact B to contact D by similarly detect an error rate or the like, the reception state to select a good one radio frequency band based on these detection results.

そして、無線周波数帯f1における受信状態の方が良好と判定された場合には、次に、アンテナ切替えスイッチ40の接点Aを接点Bと接続し、接点Dは接点Eに切替え接続することにより、基地局側から無線周波数帯f1で送信される信号を、送受信アンテナ1及び2で同時に受信し、それぞれの復調出力におけるエラーレート等を検出する。 By when towards the receiving state in the radio frequency band f1 is determined to good, then the contact point A of the antenna changeover switch 40 is connected to the contact B, contact D is for connection switching to the contact E, a signal from a base station is transmitted at a radio frequency band f1, and receives at the same time transmitting and receiving antenna 1 and 2, detects an error rate and the like in each of the demodulated output. 検出の結果、送受信アンテナ2での受信状態の方が良好と判定された場合には、アンテナ切替えスイッチ40の接点Aを接点Eと接続し、接点Dを接点Bに切替え接続することにより、受信状態が良好な送受信アンテナ2のチャネルを選択する。 Result of the detection, when the better reception state at the transmitting and receiving antennas 2 is determined as good, the contact point A of the antenna changeover switch 40 is connected to the contact point E, by connecting switch contacts D to the contact B, the received state selects a good channel for transmitting and receiving antenna 2.

即ち、無線周波数帯f1における受信状態が良好な送受信アンテナ2のチャネルを選択する場合、アンテナ切替えスイッチ40の接点Aと接点Bの接続および接点Dと接点Eの接続を切り離し、その後、接点Dと接点Bを接続し、接点Aと接点Eを接続する制御を行い、受信は、送受信アンテナ2→アンテナ共用器5→ローノイズアンプ13→受信部19→ベースバンド部22の経路および、送受信アンテナ1→受信部フィルタ41→ローノイズアンプ17→受信部21→ベースバンド部22の経路からなるダイバーシティー受信とし、また送信は、ベースバンド部22→送信部20→パワーアンプ15→アイソレータ11→アンテナ共用器5→送受信アンテナ2の経路を選択して無線周波数帯f1による通信を行う。 That is, when the receiving state in the radio frequency band f1 to select good channel transmit and receive antennas 2, disconnects the connection of the connection and the contact D and the contact E of the contact A and the contact B of the antenna changeover switch 40, then the contact point D performs control to connect the contact B, and connect the contact point a and contact point E, the reception, the path of the transmitting and receiving antenna 2 → antenna duplexer 5 → the low-noise amplifier 13 → receiver 19 → the baseband unit 22 and the transmitting and receiving antenna 1 → a diversity receiver comprising a path of the receiver filter 41 → the low-noise amplifier 17 → receiver 21 → baseband unit 22, also transmission baseband unit 22 → the transmission unit 20 → the power amplifier 15 → the isolator 11 → antenna duplexer 5 → communicates by radio frequency band f1 by selecting the path of the transmitting and receiving antenna 2.

このように図4に示す受信ダイバーシティー回路の場合、送信アンテナの切替え機能を持たせようとすると、複雑で高機能のアンテナ切替えスイッチ40が必要であり、またこのようなアンテナ切替えスイッチは、構成が複雑なために通過特性、波形歪み特性の劣化要因となる。 For reception diversity circuit in this manner shown in FIG. 4, when an attempt to have the switching function of transmitting antennas, it requires a complicated antenna changeover switch 40 of the high function and switch changeover Such an antenna configuration pass characteristic due to the complexity, it causes degradation of waveform distortion characteristics. さらにチップサイズも大きくなるとともに、コストも高くなるため実現性が困難である。 Further with also increases the chip size, it is difficult also for feasibility high cost. また送信アンテナ切替え制御を行う際には受信経路も同時に切替えなければならない場合が生ずるため、受信状態を一瞬止めなければならず、受信回路の制御に影響を与えるという問題もある。 Since the case of the receive path must also switched simultaneously occurs is when performing control switching transmit antennas must stop receiving state momentarily, there is a problem that affects the control of the receiving circuit.

図5は、このような問題を解消する方法として考えられる受信ダイバーシティー回路を示す概略ブロック図である。 Figure 5 is a schematic block diagram showing a receiver diversity circuit considered as a method to solve such a problem.

図5に示す受信ダイバーシティー回路では、送信回路も2系統備える構成とすることにより、図4に示す複雑で高機能のアンテナ切替えスイッチ40を不要とし、かつ送信アンテナ切替え制御を行う際の受信経路の切替えをなくして受信回路の制御に影響を与えないようにすることができるが、送信回路も2系統備えなければならないため、その分のコスト、および実装面積が必要となり、またベースバンド部からの送信切替え制御が複雑になるという別の問題が生ずる。 The reception diversity circuit shown in FIG. 5, by the structure where the transmitting circuit also comprises two systems, receive paths when performing the required switch 40 switching the antenna complex and sophisticated shown in FIG. 4, and transmission antenna switching control Although switching may be so as not to affect the control of the reception circuit to eliminate the of, for transmitting circuit nor to be provided two systems, the cost of that amount, and the mounting area is required and the baseband section It arises another problem sending switching control becomes complicated.

本発明の目的は、上記問題点を解消し、比較的簡単な構成で、送信アンテナの切替え機能も持たせた受信ダイバーシティー回路を実現する手段を提供することにある。 An object of the present invention is to solve the above problems, a relatively simple structure, is to provide means for implementing the reception diversity circuit functions were also given switching transmit antennas.

本発明は、第1の無線周波数帯と、該無線周波数帯と異なる第2の無線周波数帯の双方で送受信可能な無線端末装置における受信ダイバーシティー回路であって、前記第1の無線周波数帯または第2の無線周波数帯の信号を送受信する第1、第2の送受信アンテナと、前記第1または第2の送受信アンテナで受信された第1の無線周波数帯の信号を復調する第1の受信部と、前記第1または第2の送受信アンテナで受信された第2の無線周波数帯の信号を復調する第2の受信部と、前記第1の無線周波数帯または第2の無線周波数帯の信号を送信信号として出力する送信部と、前記第1の送受信アンテナを、前記第1の無線周波数帯の信号送受信用または前記第2の無線周波数帯の信号送受信用に切替える第1の単極双投型周波数帯切替えス The present invention includes a first radio frequency band, a reception diversity circuit in capable of transmitting and receiving wireless terminal in both of the second radio frequency band different from the radio frequency band, the first radio frequency band or first, a first receiver for demodulating the second reception antennas, the signal of the first radio frequency band received by said first or second receiving antenna for transmitting and receiving signals of the second radio frequency band If a second receiver for demodulating a second radio frequency band of the signal received by the first or second receive antenna, said first radio frequency band or signals of the second radio frequency band a transmission unit for outputting as a transmission signal, said first transmitting and receiving antenna, a first single-pole double-throw switch to signal transmission and reception of the first radio signal transmission and reception in the frequency band or the second radio frequency band scan switching frequency band ッチと、前記第2の送受信アンテナを、前記第1の無線周波数帯の信号送受信用または前記第2の無線周波数帯の信号送受信用に切替える第2の単極双投型周波数帯切替えスイッチと、前記送信部から出力される前記第1の無線周波数帯の信号を、前記第1の送受信アンテナまたは前記第2の送受信アンテナのいずれか一方へ切替えて送出する第1の単極双投型送信アンテナ切替えスイッチと、前記送信部から出力される前記第2の無線周波数帯の信号を、前記第1の送受信アンテナまたは前記第2の送受信アンテナのいずれか一方へ切替えて送出する第2の単極双投型送信アンテナ切替えスイッチと、前記第1および第2の単極双投型周波数帯切替えスイッチを切替え制御することにより、前記第1、第2の送受信アンテナで前記第1ま And pitch, the second receiving antenna, said first switch switching the second single-pole double-throw frequency band switching for signal transmission and reception for transmitting and receiving signals or the second radio frequency band of the radio frequency band , a signal of the first radio frequency band outputted from the transmitting unit, the first of the first single-pole double-throw delivering switched either to one of the transmitting and receiving antenna or the second transceiver antenna transmission an antenna changeover switch, wherein the signal of the second radio frequency band outputted from the transmitting unit, the first receiving antenna or the second single-pole sending switched either to one of said second transmitting and receiving antenna a double-throw transmit antenna changeover switch, by controlling switching of said first and second single-pole double-throw frequency band changeover switch, wherein the first, the first or the second receiving antenna は第2の無線周波数帯の信号をそれぞれ受信して受信状態を判定し、受信状態の良好な無線周波数帯を使用無線周波数帯として選択する手段、および該選択した使用無線周波数帯の信号を前記第1および第2の送受信アンテナでそれぞれ受信して受信状態を判定し、受信状態の良好な送受信アンテナを選択する手段と、前記第1または第2の単極双投型送信アンテナ切替えスイッチを切替え制御することにより、前記送信部から出力される前記選択された使用無線周波数帯の送信信号を前記選択された送受信アンテナに供給する手段を有するダイバーシティー制御部を備えていることを特徴としている。 The signals of the second radio frequency band of the signal to determine the reception state received respectively, means for selecting a good radio frequency band of the receiving state as used radio frequency band, and the selected used radio frequency band and received respectively by the first and second transmitting and receiving antennas to determine the reception state, switching means for selecting a favorable transmission and reception antennas of the reception state, the first or second single-pole double-throw transmit antenna changeover switch by controlling it is characterized in that it comprises a diversity control unit having means for supplying a transmission signal of the selected used radio frequency band output from the transmitting unit to the selected receiving antenna.

本発明の受信ダイバーシティー回路構成によれば、低機能のアンテナスイッチ(単極双投型スイッチ)と送信回路1系統で、2系統のアンテナで同時受信をしながら、受信回路に影響を与えずに、送信経路の切替えを可能にすることができる。 According to the reception diversity circuit configuration of the present invention, and the transmitting circuit 1 system of low function antenna switch (single pole double throw switch), while the simultaneous reception at two systems of antennas, without affecting the receiver circuit , it is possible to allow the switching of the transmission path. また、2系統の送信回路を必要としないために、ベースバンド部からの送信切替え制御を必要とせず、かつコスト、実装面積を抑えることができる。 Further, in order not to require transmission circuit of two systems, without requiring transmission switching control from the baseband unit, and it is possible to suppress costs, the mounting area.

また本発明の他の実施形態は、第1の無線周波数帯と、該無線周波数帯と異なる第2の無線周波数帯の双方で送受信可能な無線端末装置における受信ダイバーシティー回路であって、前記第1の無線周波数帯または第2の無線周波数帯の信号を送受信するN(N≧3)個の送受信アンテナと、前記N個の送受信アンテナと対応して設けられ、該送受信アンテナで受信された第1の無線周波数帯の信号をそれぞれ復調する第1の受信部と、前記N個の送受信アンテナと対応して設けられ、該送受信アンテナで受信された第2の無線周波数帯の信号をそれぞれ復調する第2の受信部と、前記第1の無線周波数帯または第2の無線周波数帯の信号を送信信号として出力する送信部と、前記N個の送受信アンテナにそれぞれ接続されて、当該送受信ア Further another embodiment of the present invention includes a first radio frequency band, a reception diversity circuit in capable of transmitting and receiving wireless terminal in both of the second radio frequency band different from the radio frequency band, said first and N (N ≧ 3) pieces of receiving antennas for transmitting and receiving the first radio frequency band or signals of a second radio frequency band, provided corresponding to the N number of receiving antennas, first received by said transmission reception antenna a first receiving unit for demodulating the first radio frequency band signals, respectively, it said provided corresponding to N-number of reception antennas, demodulates the signal of the second radio frequency band received by said transmission reception antenna respectively a second receiving unit, a transmitting unit which outputs the first radio frequency band or signals of the second radio frequency band as the transmitted signal, are respectively connected to the N reception antennas, the transceiver a テナを前記第1の無線周波数帯の信号送受信用、または前記第2の無線周波数帯の信号送受信用に切替えるN個の単極双投型周波数帯切替えスイッチと、前記送信部から送出される前記第1の無線周波数帯の信号を前記N個の送受信アンテナから選択された1つの送受信アンテナと接続して出力する第1の単極N投型送信アンテナ切替えスイッチと、前記送信部から送出される前記第2の無線周波数帯の信号を前記N個の送受信アンテナから選択された1つの送受信アンテナと接続して出力する第2の単極N投型送信アンテナ切替えスイッチと、前記N個の単極双投型周波数帯切替えスイッチを切替え制御することにより、前記N個の送受信アンテナで前記第1または第2の無線周波数帯の信号をそれぞれ受信して受信状態を判定し、受信 Said first radio frequency signals for transmission and reception or the second of the N switch switching single-pole double-throw frequency band to switch for signal transmission and reception of radio frequency bands, the antenna, the sent from the transmission unit the first and single pole N-throw transmit antenna changeover switch which outputs a signal of the first radio frequency band by connecting to one of the transmitting and receiving antenna selected from the N reception antennas, is sent from the transmission unit said second second single-pole N-throw transmit antenna changeover switch to the radio frequency signals and outputs connected to one of the transmitting and receiving antenna selected from the N reception antennas, said N monopolar by controlling the switching of the changeover switch double-throw frequency band, to determine the N reception state signal receiving each of the transmission and reception antenna first or second radio frequency band, receiving 態の良好な無線周波数帯を使用無線周波数帯として選択する手段、および該選択した使用無線周波数帯の信号を前記N個の送受信アンテナでそれぞれ受信して受信状態を判定し、受信状態の良好な送受信アンテナを選択する手段と、前記第1または第2の単極双投型送信アンテナ切替えスイッチを切替え制御することにより、前記送信部から出力される前記選択された使用無線周波数帯の送信信号を前記選択された送受信アンテナに供給する手段を有するダイバーシティー制御部を備えていることを特徴としている。 It means for selecting a good radio frequency band condition as used radio frequency band, and a signal of the operational radio frequency band and said selected determines the reception state received respectively by the N receiving antennas, the reception state good means for selecting a receiving antenna, by controlling switching of the first or second single-pole double-throw transmit antenna changeover switch, a transmission signal of the selected used radio frequency band output from the transmission unit It is characterized in that it comprises a diversity controller having a means for supplying to the selected receiving antenna.

また本発明の他の実施形態は、第1の無線周波数帯と、該無線周波数帯と異なる第2の無線周波数帯の双方で送受信可能な無線端末装置における送受信ダイバーシティー回路であって、前記第1の無線周波数帯または第2の無線周波数帯の信号を送受信する第1、第2の送受信アンテナと、前記第1または第2の送受信アンテナで受信された第1の無線周波数帯の信号を復調する第1の受信部と、前記第1または第2の送受信アンテナで受信された第2の無線周波数帯の信号を復調する第2の受信部と、前記第1の無線周波数帯または第2の無線周波数帯の信号を送信信号として出力する送信部と、前記第1の送受信アンテナを、前記第1の無線周波数帯の信号送受信用または前記第2の無線周波数帯の信号送受信用に切替える第1の単極双 Further another embodiment of the present invention includes a first radio frequency band, a reception diversity circuit in both transmission and reception possible wireless terminal device of the second radio frequency band different from the radio frequency band, said first first transmitting and receiving the first radio frequency band or signals of the second radio frequency band, a second receiving antenna, the signal of the first radio frequency band received by said first or second receiving antenna demodulation a first receiving unit that, a second receiving section for demodulating the signal of the second radio frequency band received by the first or second receive antenna, said first radio frequency band or the second a transmission unit for outputting the radio frequency signals as a transmission signal, said first transmitting and receiving antenna, a switch to signal transmission and reception of the first signal transmitting and receiving radio frequency band or the second radio frequency band 1 single Gokuso of 型周波数帯切替えスイッチと、前記第2の送受信アンテナを、前記第1の無線周波数帯の信号送受信用または前記第2の無線周波数帯の信号送受信用に切替える第2の単極双投型周波数帯切替えスイッチと、前記送信部から出力される前記第1の無線周波数帯の信号を前記第1および第2の送受信アンテナへ分配して送出する第1の電力分配器と、前記送信部から出力される前記第2の無線周波数帯の信号を前記第1および第2の送受信アンテナへ分配して送出する第2の電力分配器と、前記第1および第2の単極双投型周波数帯切替えスイッチを切替え制御することにより、前記第1、第2の送受信アンテナで前記第1または第2の無線周波数帯の信号をそれぞれ受信して受信状態を判定し、受信状態の良好な無線周波数帯を使用無線周 A switch switching type frequency band, said second transmitting and receiving antennas, the first of the second single-pole double-throw frequency band switching for signal transmission and reception for transmitting and receiving signals or the second radio frequency band of the radio frequency band and change-over switch, a first power divider for transmitting a signal of the first radio frequency band outputted from the transmitting unit and distributed to the first and second transmitting and receiving antennas, it is outputted from the transmitting unit the second wireless and a second power divider frequency band of the signal sent by distributing to the first and second transmitting and receiving antenna, said first and second single-pole double-throw frequency band selector switch that by controlling switching of said first, the signal of the first or second radio frequency band to determine the reception state received respectively in the second transmitting and receiving antenna, using a good radio frequency band of the reception state wireless division 数帯として選択する手段と、前記送信部から出力される前記選択された使用無線周波数帯の送信信号を前記電力分配器で分配して前記第1および第2の送受信アンテナに供給する手段を有するダイバーシティー制御部を備えていることを特徴としている。 A means for selecting as few zones, the means for supplying the transmission signal of the selected used radio frequency band to the power divider in to distribute the first and second transmitting and receiving antennas are output from the transmission unit It is characterized in that it comprises a diversity controller.

本実施形態によれば、信号送信時にも、第1および第2の送受信アンテナから同時に送信可能な構成とすることができるので、送受信ともダイバーシティー効果を期待できる。 According to this embodiment, even when the signal transmission, it is possible to simultaneously transmittable composed of a first and a second receiving antenna, it can be expected diversity effect both transmission and reception.

また本発明の他の実施形態は、第1の無線周波数帯と、該無線周波数帯と異なる第2の無線周波数帯の双方で送受信可能な無線端末装置における送受信ダイバーシティー回路であって、前記第1の無線周波数帯または第2の無線周波数帯の信号を送受信するN(N≧3)個の送受信アンテナと、前記N個の送受信アンテナと対応して設けられ、該送受信アンテナで受信された第1の無線周波数帯の信号をそれぞれ復調する第1の受信部と、前記N個の送受信アンテナと対応して設けられ、該送受信アンテナで受信された第2の無線周波数帯の信号をそれぞれ復調する第2の受信部と、前記第1の無線周波数帯または第2の無線周波数帯の信号を送信信号として出力する送信部と、前記N個の送受信アンテナにそれぞれ接続されて、当該送受信 Further another embodiment of the present invention includes a first radio frequency band, a reception diversity circuit in both transmission and reception possible wireless terminal device of the second radio frequency band different from the radio frequency band, said first and N (N ≧ 3) pieces of receiving antennas for transmitting and receiving the first radio frequency band or signals of a second radio frequency band, provided corresponding to the N number of receiving antennas, first received by said transmission reception antenna a first receiving unit for demodulating the first radio frequency band signals, respectively, it said provided corresponding to N-number of reception antennas, demodulates the signal of the second radio frequency band received by said transmission reception antenna respectively a second receiving unit, a transmitting unit which outputs the first radio frequency band or signals of the second radio frequency band as the transmitted signal, are respectively connected to the N reception antennas, the transmission and reception ンテナを前記第1の無線周波数帯の信号送受信用、または前記第2の無線周波数帯の信号送受信用に切替えるN個の単極双投型周波数帯切替えスイッチと、前記送信部から出力される前記第1の無線周波数帯の信号を前記N個の送受信アンテナへ分配して送出する第1の電力N分配器と、前記送信部から出力される前記第2の無線周波数帯の信号を前記N個の送受信アンテナへ分配して送出する第2の電力N分配器と、前記N個の単極双投型周波数帯切替えスイッチを切替え制御することにより、前記N個の送受信アンテナで前記第1または第2の無線周波数帯の信号をそれぞれ受信して受信状態を判定し、受信状態の良好な無線周波数帯を使用無線周波数帯として選択する手段と、前記送信部から出力される前記選択された使用無線周波 Said first radio frequency signals for transmission and reception or the second of the N switch switching single-pole double-throw frequency band to switch for signal transmission and reception of radio frequency bands, the antenna, the output from the transmission unit the N and the first power N divider, the signal of the second radio frequency band outputted from the transmitting unit for transmitting a signal of the first radio frequency band is distributed to the N reception antennas a second power N divider for sending and distributed to transmitting and receiving antenna of the the N number of controlling switching of the single pole double throw type band changeover switch, the N of the first or the transmission and reception antenna 2 radio frequency band of the signal to determine the received and reception state, respectively, means for selecting a good radio frequency band of the receiving state as used radio frequency band, the selected use wireless output from the transmission unit frequency 帯の送信信号を前記電力N分配器で分配して前記N個の送受信アンテナに供給する手段を有するダイバーシティー制御部備えていることを特徴としている。 It is characterized in that it comprises diversity controller having a means for supplying to the N reception antennas by distributing the transmit signal at the power N divider band.

本発明によれば、複雑で高機能のアンテナスイッチが不要になり、低機能、低コストの従来と同等のアンテナスイッチで、受信ダイバーシティー回路に、送信アンテナの切替え機能を付加することができる。 According to the present invention eliminates the need for an antenna switch complex and sophisticated, low functionality, in a conventional equivalent of the antenna switch of low cost, the reception diversity circuit, it is possible to add switching functionality of the transmit antennas.

また、2系統のアンテナで同時受信しながら、受信回路の制御に影響を与えずに、送信経路のみを簡易な制御で切替えることが可能になる。 Further, while simultaneously received by two systems of antennas, without affecting the control of the receiving circuit, it is possible to switch only the transmission path by a simple control.

更に2系統の送信回路を必要としないために、ベースバンド部からの送信切替え制御を必要とせず、かつコスト、実装面積を抑えることができる。 To further does not require the transmission circuit of two systems, without requiring transmission switching control from the baseband unit, and it is possible to suppress costs, the mounting area.

図1は、本発明の第1の実施形態を示す受信ダイバーシティー回路の要部ブロック図である。 Figure 1 is a schematic block diagram of a receiver diversity circuit according to a first embodiment of the present invention.

本実施形態の受信ダイバーシティー回路は、周波数の異なる無線周波数帯f1とf2(例えば800MHz帯と2GHz帯)の双方で送受信可能な無線端末装置における受信ダイバーシティー回路として用いることができる。 Receiving diversity circuit of this embodiment can be used as a receiver diversity circuit in both transmission and reception can be a wireless terminal device with the radio frequency band f1 with different frequencies f2 (e.g. 800MHz band and 2GHz band). 送受信アンテナ1,2はこれら2つの無線周波数帯f1とf2の両方の信号に対して送受信可能なアンテナ構成となっており、単極双投型の周波数帯切替えスイッチ3,4により無線周波数帯f1の信号送受信用、または無線周波数帯f2の信号送受信用に切替えられる。 Transmitting and receiving antenna 1 and 2 has a antenna capable of transmitting and receiving arrangement for both of these two radio frequency bands f1 and f2 of the signal, the frequency band selector switch 3 and 4 of the single-pole double-throw radio frequency band f1 signal transmission and reception, or is switched to the signal transmitting and receiving radio frequency band f2.

アンテナ共用器5,7は、送受信アンテナ1,2が周波数帯切替えスイッチ3,4により無線周波数帯f1の送受信用に切替えられたとき、送受信アンテナ1,2で受信された無線周波数帯f1の信号を受信部19,21側へ通過させ、送信部20から出力された無線周波数帯f1の信号を送受信アンテナ1,2へ通過させる機能を備えており、無線周波数帯f1を通過させる帯域フィルタ特性を有している。 Antenna duplexer 5 and 7 when the receiving antenna 1 is switched for transmission and reception of the radio frequency band f1 by the switches 3 and 4 switching frequency band, the radio frequency signals f1 received by the receiving antennas 1 passed to the receiving unit 19, 21 side, a signal of a radio frequency band f1 outputted from the transmitting unit 20 has a function of passing the transmission and reception antenna 1, a band pass filter characteristic for passing the radio frequency band f1 It has. また、アンテナ共用器6,8は、送受信アンテナ1,2が周波数帯切替えスイッチ3,4により無線周波数帯f2の送受信用に切替えられたとき、送受信アンテナ1,2で受信された無線周波数帯f2の信号を受信部19,21側へ通過させ、送信部20から出力された無線周波数帯f2の信号を送受信アンテナ1,2へ通過させる機能を備えており、無線周波数帯f2を通過させる帯域フィルタ特性を有している。 The antenna duplexer 6 and 8, when the transmitting and receiving antenna 1 is switched for transmission and reception of the radio frequency band f2 by the switches 3 and 4 switching frequency band, a radio frequency band f2 received by the transmitting and receiving antenna 1 and 2 the signal is passed through to the receiving unit 19, 21 side, a signal of a radio frequency band f2 outputted from the transmitting unit 20 has a function of passing the transmission and reception antenna 1, a band filter for passing radio frequency band f2 It has a characteristic.

13、17は、送受信アンテナ1,2で受信された無線周波数帯f1の信号を増幅して受信部19、21へ出力するローノイズアンプであり、14、18は、送受信アンテナ1,2で受信された無線周波数帯f2の信号を増幅して受信部19、21へ出力するローノイズアンプである。 13 and 17 is a low noise amplifier for amplifying and outputting a signal of a radio frequency band f1 received by the transmitting and receiving antenna 1 to the receiver 19, 21, 14 and 18 is received by the transmission and reception antennas 1 and a low-noise amplifier to output signal amplified by the receiving unit 19, 21 a radio frequency band f2. 受信部19、21は、送受信アンテナ1,2で受信された無線周波数帯f1またはf2の信号を復調してベースバンド部22へ出力する。 Receiving unit 19 and 21, and outputs the demodulated signals of a radio frequency band f1 or f2 received by the receiving antenna 1 into the baseband unit 22.

一方、送信部20は、ベースバンド部22から入力された送信ベースバンド信号を変調して無線周波数帯f1またはf2にアップコンバートし、パワーアンプ15または16で電力増幅した後、アイソレータ11または12を介して単極双投型の送信アンテナ切替えスイッチ9または10に供給する。 On the other hand, the transmission unit 20 up-converts the radio frequency band f1 or f2 by modulating the transmit baseband signal input from the baseband unit 22, after power amplification by a power amplifier 15 or 16, the isolator 11 or 12 through and supplied to the transmitting antenna changeover switch 9 or 10 of the single-pole double-throw. 単極双投型の送信アンテナ切替えスイッチ9または10は、送受信アンテナ1,2のいずれか一方を送信アンテナとして使用するための切替え操作を行う。 Transmitting antenna changeover switch 9 or 10 of the single-pole double-throw performs switching operation for use as a transmitting antenna either the transmitting and receiving antenna 1 and 2. なお、これらの切替えスイッチの使用されていない経路が開放状態とならないように、空き端子は、50Ω等で終端される構成とする。 Note that the path that is not used in these changeover switch so as not to open, empty terminal is configured to be terminated with 50Ω like.

また、図示されていないが、本実施形態の各スイッチの切替え制御を行ってダイバーシティー機能を実行するために、本実施形態の受信ダイバーシティー回路には、単極双投型周波数帯切替えスイッチ3,4を切替え制御して、送受信アンテナ1で無線周波数帯f1とf2の信号を受信し、送受信アンテナ2でも無線周波数帯f1とf2の信号を受信することにより、無線周波数帯f1とf2の中から受信状態の良好な無線周波数帯を使用無線周波数帯として選択する手段と、選択された使用無線周波数帯の信号を送受信アンテナ1、2で同時に受信することにより送受信アンテナ1,2のどちらの受信状態の方が良好であるかを判定し、受信状態の良好な送受信アンテナを送信用アンテナとして選択する手段と、該選択された使用無線周波 Further, although not shown, in order to perform the diversity function performs switching control of the switches in the present embodiment, the reception diversity circuit of this embodiment, single-pole double-throw frequency band changeover switch 3 controls switching the 4 receives the radio frequency signals f1 and f2 by the transmission and reception antenna 1, by receiving the radio frequency signals f1 and f2 also receiving antenna 2, in the radio frequency band f1 and f2 means for selecting a good radio frequency band of the receiving state as used radio frequency band from which the reception of the transmitting and receiving antennas 1 and 2 by simultaneously receiving signals using a radio frequency band selected by the transmission and reception antennas 1 to determine who in good condition, means for selecting a favorable transmission and reception antennas of the reception state as a transmitting antenna, said selected using radio frequency 帯での信号を前記選択された送受信アンテナから送信するように単極双投型送信アンテナ切替えスイッチ9,10と送信部20を制御する手段を有するダイバーシティー制御部が、当該無線端末装置の例えばベースバンド部22内に備えられている。 Diversity control unit having means for controlling the single-pole double-throw transmit antenna changeover switches 9 and 10 and the transmitter 20 to transmit a signal at the band from the selected reception antennas, for example of the wireless terminal device It is provided to the baseband unit 22.

このダイバーシティー制御部は、例えば、まず無線周波数帯f1を受信するように単極双投型周波数帯切替えスイッチ3,4を切替え、送受信アンテナ1の経路と送受信アンテナ2の経路の受信信号強度を測定し、次に無線周波数帯f2を受信するように単極双投型周波数帯切替えスイッチ3,4を切替えて送受信アンテナ1の経路と送受信アンテナ2の経路の受信信号強度を測定することにより受信信号強度の強い無線周波数帯を判定して選択する。 The diversity control unit, for example, first switch the single-pole double-throw frequency band changeover switches 3 and 4 to receive a radio frequency band f1, the received signal strength for the paths of the path of the transmitting and receiving antenna 1 and the reception antenna 2 measured, then received by measuring the received signal strength of the single-pole double-throw path of the transmitting and receiving antenna 1 frequency band switching by switching the switches 3 and 4 and the path of the transmitting and receiving antenna 2 to receive a radio frequency band f2 selecting and determining a strong signal strength radio frequency band. そして次に、選択された受信信号強度の強い無線周波数帯の信号を2つのアンテナ経路で同時に受信してその受信信号強度を比較し、受信信号強度の強い経路を送信及び受信を行うメインのアンテナ経路、受信信号強度が弱い方を受信専用のサブアンテナ経路と設定するように各アンテナスイッチの切替え制御等を行う構成として実現される。 And then, the main antenna for comparing the received signal strength received at the same time the signal of strong radio frequency band of the selected received signal strength two antenna paths, to transmit and receive the strongest path of the received signal strength path, the received signal strength is realized as a configuration for performing switching control of each antenna switch to set the receive-only sub-antenna path towards weak.

これらの制御は、例えば基地局から不定期に送出される周波数の比較命令を受けて、端末側が各々の周波数帯の信号強度比較を行う、あるいは通信開始時、端末の開閉動作、受信レベルが下がった時などに比較を行って、周波数帯、アンテナ経路の切替え制御を行う等、適宜のタイミングで実行可能である。 These controls, for example, receives the comparison instruction frequencies sent at irregular intervals from the base station, the terminal side performs the signal strength comparison of each frequency band, or at the start of communication, the opening and closing operation of the terminal, lowered reception level and the like by performing a comparison time, frequency band, or the like for switching control of the antenna path can be performed at an appropriate timing.

本実施形態では、受信回路が2系統、送信回路が1系統の構成とし、無線周波数帯にアップコンバートされた送信信号を増幅するパワーアンプ15,16あるいはアイソレータ11,12を介した出力側と、送受信の周波数を分離するアンテナ共用器5〜8との間に、例えばSPDT(Single Pole Double Throw:単極双投)スイッチ9,10を備えることによって、アンテナ1とアンテナ2のいずれかに送信経路を切替えることができる。 In this embodiment, the receiving circuit two systems, the transmission circuit is the configuration of one system, and an output side via a power amplifier 15, 16 or isolator 11 and 12 for amplifying the transmission signal up-converted into a radio frequency band, between the duplexer 5-8 for separating the frequencies of transmission and reception, for example SPDT: transmission path by providing the (single pole double throw SPDT) switches 9 and 10, with one of the antennas 1 and 2 it can be switched. このような構成にすることにより、複雑で高機能なアンテナスイッチが不要になり、低機能、低コストの従来と同等のアンテナスイッチで送信アンテナの切替え可能な回路構成を実現できる。 By such a configuration eliminates the need for complex and sophisticated antenna switch, a low function, it can be realized switchable circuit configuration of the transmitting antenna in a conventional equivalent of the antenna switch of low cost. かつ受信回路の制御に影響を与えずに、送信経路のみを簡易な制御で切替えることが可能になる。 And without affecting the control of the receiving circuit, it is possible to switch only the transmission path by a simple control.

実施例の動作の説明 Description of the operation of the embodiment

次に、本実施形態の動作について、図1を参照して説明する。 Next, the operation of this embodiment will be described with reference to FIG.

本実施形態では、使用周波数帯が、f1、f2の2帯域の無線周波数帯を使用した送受信回路の構成となっている。 In this embodiment, the use frequency band, and has a configuration of a transceiver circuit using a second band of radio frequency bands f1, f2. まず受信について説明する。 First reception will be described. 受信ダイバーシティーであるために、アンテナ1及び2の2系統で同時受信し、アンテナスイッチ3及び4に入力される。 To be received diversity, simultaneously received by two systems of antennas 1 and 2 are input to the antenna switch 3 and 4. アンテナスイッチ3及び4は、ベースバンド部22から制御され、使用する周波数帯f1、f2の経路を選択して、それぞれの周波数帯の信号を受信する。 Antenna switch 3 and 4 is controlled from the baseband unit 22 selects a path in the frequency band f1, f2 used to receive the signals of the respective frequency bands.

受信信号は、送信帯f1(Tx)と受信帯f1(Rx)、或いは送信帯f2(Tx)と受信帯f2(Rx)を分離するアンテナ共用器5,7或いはアンテナ共用器6,8を経由してローノイズアンプ13,17或いはローノイズアンプ14,18に入力される。 Received signal via an antenna duplexer 5,7 or antenna duplexer 6 and 8 to separate the transmission band f1 (Tx) and the reception band f1 (Rx), or transmission band f2 (Tx) and the reception band f2 (Rx) It is input to the low-noise amplifier (13, 17) or low-noise amplifier 14 and 18. これらのローノイズアンプで増幅された受信信号は、受信部19,21でダウンコンバート、及び復調されてベースバンド部22へ入力され、信号処理される。 The received signal amplified by these low-noise amplifier, down-conversion in reception section 19, 21, and demodulated is input to the baseband unit 22 is signal processing.

この信号処理の過程で、受信状態の良好な無線周波数帯が判定され、該判定された受信状態の良好な無線周波数帯を用いて送受信を行うように単極双投型周波数帯切替えスイッチ3,4が切替えられる。 In the course of signal processing, good radio frequency band of the reception state is determined, the determination has been unipolar to transmit and receive with good radio frequency band of the receiving state double-throw frequency band changeover switch 3, 4 is switched. 次いでアンテナ1及び2の中から受信状態の良好なアンテナが判定され、該判定された受信状態の良好な方のアンテナを用いて送受信を行うとともに、受信状態の良くないアンテナを受信専用のサブアンテナとする設定を行う。 Then good antenna reception state from among the antennas 1 and 2 is determined, the determination has been with transmit and receive with good ones of the antenna of the reception state, the reception dedicated poor antenna reception mode sub antenna the setting to be done. この設定処理に従って、送信部20から送信される送信周波数帯の選定、および単極双投型送信アンテナ切替えスイッチ9,10の切替え制御が行われる。 According to this setting process, selection of the transmission frequency band transmitted from the transmitting unit 20, and switching control of the single-pole double-throw transmit antenna changeover switches 9 and 10 are carried out.

その結果、送信系では、選択された受信状態の良好な無線周波数帯を用いた送信波が、受信状態の良いアンテナ経路を経由して送信される。 As a result, in the transmission system, the transmission wave with a good radio frequency band of the selected reception state is transmitted via a good antenna path receiving status. 上記のように構成することによって、2つのアンテナから同時受信しながら、送信経路を切替えることができるので、受信回路の制御に影響を与えずに、送信経路のみを簡易な制御で切替えることが可能になる。 By configuring as above, while simultaneously received from the two antennas, it is possible to switch the transmission path, without affecting the control of the receiving circuit, it can be switched only the transmission path with a simple control become.

例えば、無線周波数帯f2が受信状態の良好な周波数帯と判定された場合には、単極双投型周波数帯切替えスイッチ3,4は、それぞれ端子aとcが接続されるように制御される。 For example, when a radio frequency band f2 is determined to good frequency band of the receiving state, the switches 3 and 4 switching single-pole double-throw frequency band is controlled such that each the terminal a and c are connected . その結果、周波数帯f2の受信信号がローノイズアンプ14,18経由で受信部19,21に入力され、受信部19,21で復調された受信信号がベースバンド部22に入力されて、それぞれ信号処理される。 As a result, the received signal in the frequency band f2 is inputted to the receiving unit 19, 21 via the low noise amplifier 14 and 18, the received signal demodulated by the receiving section 19 and 21 is input to the baseband unit 22, respectively signal processing It is. この信号処理の結果、例えばアンテナ1の経路の受信状態がアンテナ2の経路の受信状態よりも良好であると判定された場合には、単極双投型送信アンテナ切替えスイッチ10の端子aとbを接続する制御が実行される。 The result of this signal processing, for example, when the reception state of a path of the antenna 1 is determined to be better than the reception state of a path of the antenna 2, the single-pole double-throw transmit antenna changeover switch 10 terminals a and b control of connection is performed to.

また、送信部20は周波数帯f2でアップコンバートした送信信号を出力するように制御されるので、送信部20から出力された周波数帯f2の送信信号は、パワーアンプ16、アイソレータ12、単極双投型送信アンテナ切替えスイッチ10、アンテナ共用器6、単極双投型周波数帯切替えスイッチ3を経由してアンテナ1から送信される。 Further, since the transmitter 20 is controlled to output the transmission signal up-converted in the frequency band f2, the transmission signal of the frequency band f2 outputted from the transmitting unit 20, a power amplifier 16, isolator 12, Tankyokuso throw transmitting antenna changeover switch 10, an antenna duplexer 6 via a single pole double throw type band changeover switch 3 is transmitted from antennas 1. 一方、単極双投型周波数帯切替えスイッチ4は、端子aとcが接続された状態となっているので無線周波数帯f2の受信は可能であるが、単極双投型送信アンテナ切替えスイッチ10により送信信号経路は切り離されているので、アンテナ2は無線周波数帯f2の受信専用のサブアンテナとして動作する。 On the other hand, the selection switch 4 single pole double throw type band is terminal a and c are possible reception of radio frequency band f2 since a connected state, the switch 10 switching SPDT type transmitting antenna since the transmit signal path is disconnected by the antenna 2 operates as a receive-only sub-antenna radio frequency band f2.

図2は、本発明の第2の実施形態を示す受信ダイバーシティー回路の要部ブロック図である。 Figure 2 is a schematic block diagram of a receiver diversity circuit according to a second embodiment of the present invention.

図1に示す第1の実施形態では、2本のアンテナを用いた受信ダイバーシティー回路を構成しているが、本実施形態は、3本のアンテナを用いた受信ダイバーシティー回路を構成したことを特徴としており、そのため、図1に示す第1の実施形態に対して、アンテナ23、単極双投型周波数帯切替えスイッチ24、アンテナ共用器25,26、ローノイズアンプ29,30、受信部31が追加され、図1の単極双投型送信アンテナ切替えスイッチ9,10は、単極三投型送信アンテナ切替えスイッチ27,28に変更されている。 In the first embodiment shown in FIG. 1 and also forms the reception diversity circuit using two antennas, the present embodiment, by being configured to receive diversity circuit using three antennas are characterized, therefore, the first embodiment shown in FIG. 1, an antenna 23, a single-pole double-throw frequency band changeover switch 24, antenna duplexer 25, low noise amplifier 29 and 30, the reception section 31 It is added, a single-pole double-throw transmit antenna changeover switches 9 and 10 in FIG. 1 is changed to Tankyokusan throw transmitting antenna changeover switch 27, 28.

本実施形態の動作は、3本のアンテナの中から受信状態の最も良いアンテナを送受信用アンテナとして用い、他の2本のアンテナを受信専用のサブアンテナとして用いるように制御している点を除けば、図1に示す第1の実施形態の動作と同様であるので、詳細な動作説明については省略する。 Operation of the present embodiment, using the best antenna for reception state as the transmit-receive antenna among the three antennas, except that controls to use the other two antennas as a receive-only sub-antenna if is similar to the operation of the first embodiment shown in FIG. 1 is omitted the detailed operation description. なお、アンテナの本数は、上記実施形態の2本あるいは3本に限らず、N(N≧3)本に拡張することも可能であり、単極N投型の送信アンテナ切替えスイッチを用いることにより本発明を実現することができる。 Incidentally, the number of antennas is not limited to two or three of the above embodiments, N (N ≧ 3) It is also possible to extend the present, by using a single-pole N-throw transmit antenna changeover switch it is possible to realize the present invention.

図3は、本発明の第3の実施形態を示す受信ダイバーシティー回路の要部ブロック図である。 Figure 3 is a schematic block diagram of a receiver diversity circuit according to a third embodiment of the present invention.

図1に示す第1の実施形態では、単極双投型送信アンテナ切替えスイッチ9,10を用いることにより、受信状態の良いアンテナを送受信用アンテナとして用い、他方のアンテナを受信専用のサブアンテナとして用いるように制御したが、本実施形態では、単極双投型送信アンテナ切替えスイッチの代替として、電力2分配器32,33を使用し、アンテナ1及び2を、同時に送受信可能な構成とすることで、送受信ともにダイバーシティー機能を実現可能としたことを特徴としている。 In the first embodiment shown in FIG. 1, by using a single-pole double-throw transmit antenna changeover switches 9 and 10, using a good reception state antenna as receiving antenna, the other antenna as a reception-only sub-antenna was controlled to use, in the present embodiment, as an alternative to the single-pole double-throw transmit antenna changeover switch, using power 2 divider 32 and 33, the antenna 1 and 2, and can simultaneously transmit and receive configurations that in is characterized in that a feasible diversity function both transmission and reception.

本実施形態の動作は、アンテナ1及び2を、同時に送信アンテナとしても使用するために、アンテナ1及び2の中から受信状態の良好なアンテナを判定して送信アンテナを切替える制御が不要となる点を除いて、図1に示す第1の実施形態の動作と同様であるので、詳細な動作説明については省略する。 Operation of the present embodiment, the antenna 1 and 2, in order to be used as a transmission antenna at the same time, that the control of switching the transmitting antennas to determine the good antenna reception state from among the antennas 1 and 2 are not required except for is similar to the operation of the first embodiment shown in FIG. 1 is omitted the detailed operation description. なお、アンテナの本数は、上記実施形態の2本に限らず、N(N≧3)本に拡張することが可能であり、その場合には電力N分配器を用いることにより本発明を実現できる。 Incidentally, the number of antennas is not limited to two in the above embodiment, N (N ≧ 3) it is possible to extend the present, the present invention can be realized by using the power N divider in which case .

本発明の第1の実施形態を示す受信ダイバーシティー回路のブロック図である。 It is a block diagram of a receiver diversity circuit according to a first embodiment of the present invention. 本発明の第2の実施形態を示す受信ダイバーシティー回路のブロック図である。 It is a block diagram of a receiver diversity circuit according to a second embodiment of the present invention. 本発明の第3の実施形態を示す受信ダイバーシティー回路のブロック図である。 It is a block diagram of a receiver diversity circuit according to a third embodiment of the present invention. 受信ダイバーシティー回路の従来例を示すブロック図である。 Example of a receiver diversity circuit is a block diagram showing the. 受信ダイバーシティー回路の他の従来例を示すブロック図である。 Another example of a receiver diversity circuit is a block diagram showing the.

符号の説明 DESCRIPTION OF SYMBOLS

1,2,23 アンテナ 3,4,24 単極双投型周波数帯切替スイッチ 5〜8,25,26 アンテナ共用器 9,10 単極双投型送信アンテナ切替スイッチ 11,12 アイソレータ 13,14,17,18,29,30 ローノイズアンプ 15,16 パワーアンプ 19,21,31 受信部 20,47 送信部 22 ベースバンド部 32,33 電力2分配器 1,2,23 antenna 3,4,24 single-pole double-throw frequency band selector switch 5~8,25,26 duplexer 9,10 SPDT type transmitting antenna switch 11 isolator 13, 17,18,29,30 low noise amplifier 15, 16 a power amplifier 19,21,31 receiver 20,47 transmitting unit 22 baseband section 32, 33 power 2 divider

Claims (8)

  1. 第1の無線周波数帯と、該無線周波数帯と異なる第2の無線周波数帯の双方で送受信可能な無線端末装置における受信ダイバーシティー回路であって、 A first radio frequency band, a reception diversity circuit in capable of transmitting and receiving wireless terminal in both of the second radio frequency band different from the radio frequency band,
    前記第1の無線周波数帯または第2の無線周波数帯の信号を送受信する第1、第2の送受信アンテナと、 First and second transmitting and receiving antenna for transmitting and receiving the first radio frequency band or signals of the second radio frequency band,
    前記第1または第2の送受信アンテナで受信された第1の無線周波数帯の信号を復調する第1の受信部と、 A first receiving unit for demodulating the first radio frequency band of the signal received by the first or second receive antenna,
    前記第1または第2の送受信アンテナで受信された第2の無線周波数帯の信号を復調する第2の受信部と、 A second receiver for demodulating a signal of the second radio frequency band received by said first or second receiving antenna,
    前記第1の無線周波数帯または第2の無線周波数帯の信号を送信信号として出力する送信部と、 A transmitting unit which outputs the first radio frequency band or signals of the second radio frequency band as the transmission signal,
    前記第1の送受信アンテナを、前記第1の無線周波数帯の信号送受信用または前記第2の無線周波数帯の信号送受信用に切替える第1の単極双投型周波数帯切替えスイッチと、 Said first transmitting and receiving antenna, a first switch switching first single-pole double-throw frequency band switching for signal transmission and reception for transmitting and receiving signals or the second radio frequency band of the radio frequency band,
    前記第2の送受信アンテナを、前記第1の無線周波数帯の信号送受信用または前記第2の無線周波数帯の信号送受信用に切替える第2の単極双投型周波数帯切替えスイッチと、 Said second transmitting and receiving antenna, a first switch switching the second single-pole double-throw frequency band switching for signal transmission and reception for transmitting and receiving signals or the second radio frequency band of the radio frequency band,
    前記送信部から出力される前記第1の無線周波数帯の信号を、前記第1の送受信アンテナまたは前記第2の送受信アンテナのいずれか一方へ切替えて送出する第1の単極双投型送信アンテナ切替えスイッチと、 The signal of the first radio frequency band outputted from the transmitting unit, the first receiving antenna or a single-pole double-throw transmit antennas for transmitting by switching either to one of said second transmitting and receiving antenna and the change-over switch,
    前記送信部から出力される前記第2の無線周波数帯の信号を、前記第1の送受信アンテナまたは前記第2の送受信アンテナのいずれか一方へ切替えて送出する第2の単極双投型送信アンテナ切替えスイッチと、 Wherein the signal of the second radio frequency band outputted from the transmitting unit, the first receiving antenna or the second single-pole double-throw transmit antennas for transmitting by switching either to one of said second transmitting and receiving antenna and the change-over switch,
    前記第1および第2の単極双投型周波数帯切替えスイッチを切替え制御することにより、前記第1、第2の送受信アンテナで前記第1または第2の無線周波数帯の信号をそれぞれ受信して受信状態を判定し、受信状態の良好な無線周波数帯を使用無線周波数帯として選択する手段、および該選択した使用無線周波数帯の信号を前記第1および第2の送受信アンテナでそれぞれ受信して受信状態を判定し、受信状態の良好な送受信アンテナを選択する手段と、前記第1または第2の単極双投型送信アンテナ切替えスイッチを切替え制御することにより、前記送信部から出力される前記選択された使用無線周波数帯の送信信号を前記選択された送受信アンテナに供給する手段を有するダイバーシティー制御部と、 By controlling switching of said first and second single-pole double-throw frequency band changeover switch, the first and the signal of the first or second radio frequency band in the second receiving antenna respectively received determines the reception state, means for selecting a good radio frequency band of the receiving state as used radio frequency band, and received by receiving respective signals using a radio frequency band and said selected at the first and second transmitting and receiving antenna determines the state, and means for selecting a favorable transmission and reception antennas of the reception state, by controlling switching of the first or second single-pole double-throw transmit antenna changeover switch, the selected output from the transmission unit a diversity controller having a means for supplying a transmission signal using a radio frequency band, which is to the selected transmitting and receiving antenna,
    を備えていることを特徴とする受信ダイバーシティー回路。 Receiving diversity circuit characterized in that it comprises.
  2. 前記単極双投型周波数帯切替えスイッチの一方の双投側端子は、当該単極双投型周波数帯切替えスイッチと接続された送受信アンテナで受信した前記第1の無線周波数帯の信号を、該送受信アンテナと対応して設けられた前記受信部へ通過させる手段、および前記送信部から前記第1の単極双投型送信アンテナ切替えスイッチを介して入力される第1の無線周波数帯の信号を前記送受信アンテナへ通過させる手段を有する第1のアンテナ共用器と接続され、前記単極双投型周波数帯切替えスイッチの他方の双投側端子は、当該単極双投型周波数帯切替えスイッチと接続された送受信アンテナで受信した前記第2の無線周波数帯の信号を、該送受信アンテナと対応して設けられた前記受信部へ通過させる手段、および前記送信部から前記第2の The one double throw terminal of the single-pole double-throw band changeover switch, the signal of the first radio frequency band received by a single pole double throw type band switching transmission and reception antenna connected to the switch, the It means for passing to the receiving unit provided in correspondence with the transmitting and receiving antennas, and the signals of the first radio frequency band is inputted from the transmission unit via the first single-pole double-throw transmit antenna changeover switch which is connected to the first antenna duplexer having means for passing to the transmitting and receiving antenna, the other double throw terminal of the single-pole double-throw band changeover switch, connected to the single-pole double-throw frequency band Kirikae switch the signal of the second radio frequency band received by the transmission and reception antennas is, means for passing to the receiving unit provided in correspondence with said transmission reception antenna, and the transmission unit the second 極双投型送信アンテナ切替えスイッチを介して入力される第2の無線周波数帯の信号を前記送受信アンテナへ通過させる手段を有する第2のアンテナ共用器と接続されていることを特徴とする請求項1に記載の受信ダイバーシティー回路。 Claims, characterized in that it is connected to the second antenna duplexer having means for passing signals in a second radio frequency band is inputted through the switch switching pole double throw type transmitting antenna to the receiving antenna receiving diversity circuit according to 1.
  3. 第1の無線周波数帯と、該無線周波数帯と異なる第2の無線周波数帯の双方で送受信可能な無線端末装置における受信ダイバーシティー回路であって、 A first radio frequency band, a reception diversity circuit in capable of transmitting and receiving wireless terminal in both of the second radio frequency band different from the radio frequency band,
    前記第1の無線周波数帯または第2の無線周波数帯の信号を送受信するN(N≧3)個の送受信アンテナと、 Said first radio frequency band or N for transmitting and receiving signals of the second radio frequency band (N ≧ 3) pieces of receiving antennas,
    前記N個の送受信アンテナと対応して設けられ、該送受信アンテナで受信された第1の無線周波数帯の信号をそれぞれ復調する第1の受信部と、 Provided corresponding to the N-number of reception antennas, a first receiving section for demodulating the signal of the first radio frequency band received by said transmission reception antenna, respectively,
    前記N個の送受信アンテナと対応して設けられ、該送受信アンテナで受信された第2の無線周波数帯の信号をそれぞれ復調する第2の受信部と、 Provided corresponding to the N-number of reception antennas, a second receiver for demodulating a signal of the second radio frequency band received by said transmission reception antenna, respectively,
    前記第1の無線周波数帯または第2の無線周波数帯の信号を送信信号として出力する送信部と、 A transmitting unit which outputs the first radio frequency band or signals of the second radio frequency band as the transmission signal,
    前記N個の送受信アンテナにそれぞれ接続されて、該送受信アンテナを、前記第1の無線周波数帯の信号送受信用または前記第2の無線周波数帯の信号送受信用に切替えるN個の単極双投型周波数帯切替えスイッチと、 The N are connected respectively to the transmitting and receiving antenna, the said transmission reception antenna, the first of the N single-pole double-throw switch to signal transmission and reception for transmitting and receiving signals or the second radio frequency band of the radio frequency band and a switch switching frequency band,
    前記送信部から送出される前記第1の無線周波数帯の信号を、前記N個の送受信アンテナから選択された1つの送受信アンテナと接続して出力する第1の単極N投型送信アンテナ切替えスイッチと、 Wherein the signal of the first radio frequency band transmitted from the transmitting unit, switching the first single-pole N-throw transmitting antenna and outputting the connected to one of the transmitting and receiving antenna selected from the N RF Switch When,
    前記送信部から送出される前記第2の無線周波数帯の信号を、前記N個の送受信アンテナから選択された1つの送受信アンテナと接続して出力する第2の単極N投型送信アンテナ切替えスイッチと、 Wherein the signal of the second radio frequency band transmitted from the transmitting unit, switching said N second single-pole N-throw transmitting antenna and outputting the connected to one of the transmitting and receiving antenna selected from the receiving antenna switch When,
    前記N個の単極双投型周波数帯切替えスイッチを切替え制御することにより、前記N個の送受信アンテナで前記第1または第2の無線周波数帯の信号をそれぞれ受信して受信状態を判定し、受信状態の良好な無線周波数帯を使用無線周波数帯として選択する手段、および該選択した使用無線周波数帯の信号を前記N個の送受信アンテナでそれぞれ受信して受信状態を判定し、受信状態の良好な送受信アンテナを選択する手段と、前記第1または第2の単極双投型送信アンテナ切替えスイッチを切替え制御することにより、前記送信部から出力される前記選択された使用無線周波数帯の送信信号を前記選択された送受信アンテナに供給する手段を有するダイバーシティー制御部と、 Wherein the N number of controlling switching of the single-pole double-throw frequency band selector switch determines the N reception state signal receiving each of the transmission and reception antenna first or second radio frequency band, means for selecting a good radio frequency band of the receiving state as used radio frequency band, and a signal of the operational radio frequency band and said selected determines the reception state received respectively by the N receiving antennas, the reception state is good means for selecting a such transmitting and receiving antenna, said by controlling switching of the first or second single-pole double-throw transmit antenna changeover switch, the selected used radio frequency band transmission signal output from the transmission unit a diversity controller having a means for supplying to the selected transmitting and receiving antenna,
    を備えていることを特徴とする受信ダイバーシティー回路。 Receiving diversity circuit characterized in that it comprises.
  4. 前記単極双投型周波数帯切替えスイッチの一方の双投側端子は、当該単極双投型周波数帯切替えスイッチと接続された送受信アンテナで受信した前記第1の無線周波数帯の信号を、該送受信アンテナと対応して設けられた前記受信部へ通過させる手段、および前記送信部から前記第1の単極N投型送信アンテナ切替えスイッチを介して入力される第1の無線周波数帯の信号を前記送受信アンテナへ通過させる手段を有する第1のアンテナ共用器と接続され、前記単極双投型周波数帯切替えスイッチの他方の双投側端子は、当該単極双投型周波数帯切替えスイッチと接続された送受信アンテナで受信した前記第2の無線周波数帯の信号を、該送受信アンテナと対応して設けられた前記受信部へ通過させる手段、および前記送信部から前記第2の The one double throw terminal of the single-pole double-throw band changeover switch, the signal of the first radio frequency band received by a single pole double throw type band switching transmission and reception antenna connected to the switch, the It means for passing to the receiving unit provided in correspondence with the transmitting and receiving antennas, and the signals of the first radio frequency band is inputted from the transmission unit via the first single-pole N-throw transmit antenna changeover switch which is connected to the first antenna duplexer having means for passing to the transmitting and receiving antenna, the other double throw terminal of the single-pole double-throw band changeover switch, connected to the single-pole double-throw frequency band selector switch the signal of the second radio frequency band received by the transmission and reception antennas is, means for passing to the receiving unit provided in correspondence with said transmission reception antenna, and the transmission unit the second 極N投型送信アンテナ切替えスイッチを介して入力される第2の無線周波数帯の信号を前記送受信アンテナへ通過させる手段を有する第2のアンテナ共用器と接続されていることを特徴とする請求項3に記載の受信ダイバーシティー回路。 Claims, characterized in that it is connected to the second antenna duplexer having means for passing signals in a second radio frequency band is inputted through the pole N-throw transmit antenna changeover switch to said transmitting and receiving antenna receiving diversity circuit according to 3.
  5. 第1の無線周波数帯と、該無線周波数帯と異なる第2の無線周波数帯の双方で送受信可能な無線端末装置における送受信ダイバーシティー回路であって、 A first radio frequency band, a reception diversity circuit in both transmission and reception-enabled wireless terminal device of the second radio frequency band different from the radio frequency band,
    前記第1の無線周波数帯または第2の無線周波数帯の信号を送受信する第1、第2の送受信アンテナと、 First and second transmitting and receiving antenna for transmitting and receiving the first radio frequency band or signals of the second radio frequency band,
    前記第1または第2の送受信アンテナで受信された第1の無線周波数帯の信号を復調する第1の受信部と、 A first receiving unit for demodulating the first radio frequency band of the signal received by the first or second receive antenna,
    前記第1または第2の送受信アンテナで受信された第2の無線周波数帯の信号を復調する第2の受信部と、 A second receiver for demodulating a signal of the second radio frequency band received by said first or second receiving antenna,
    前記第1の無線周波数帯または第2の無線周波数帯の信号を送信信号として出力する送信部と、 A transmitting unit which outputs the first radio frequency band or signals of the second radio frequency band as the transmission signal,
    前記第1の送受信アンテナを、前記第1の無線周波数帯の信号送受信用または前記第2の無線周波数帯の信号送受信用に切替える第1の単極双投型周波数帯切替えスイッチと、 Said first transmitting and receiving antenna, a first switch switching first single-pole double-throw frequency band switching for signal transmission and reception for transmitting and receiving signals or the second radio frequency band of the radio frequency band,
    前記第2の送受信アンテナを、前記第1の無線周波数帯の信号送受信用または前記第2の無線周波数帯の信号送受信用に切替える第2の単極双投型周波数帯切替えスイッチと、 Said second transmitting and receiving antenna, a first switch switching the second single-pole double-throw frequency band switching for signal transmission and reception for transmitting and receiving signals or the second radio frequency band of the radio frequency band,
    前記送信部から出力される前記第1の無線周波数帯の信号を前記第1および第2の送受信アンテナへ分配して送出する第1の電力分配器と、 A first power divider for transmitting and distributing signals of the first radio frequency band outputted from the transmitting unit to the first and second transmitting and receiving antennas,
    前記送信部から出力される前記第2の無線周波数帯の信号を前記第1および第2の送受信アンテナへ分配して送出する第2の電力分配器と、 A second power distributor for delivering and distributing the signal of the second radio frequency band output from the transmitting section to the first and second transmitting and receiving antennas,
    前記第1および第2の単極双投型周波数帯切替えスイッチを切替え制御することにより、前記第1、第2の送受信アンテナで前記第1または第2の無線周波数帯の信号をそれぞれ受信して受信状態を判定し、受信状態の良好な無線周波数帯を使用無線周波数帯として選択する手段と、前記送信部から出力される前記選択された使用無線周波数帯の送信信号を前記電力分配器で分配して前記第1および第2の送受信アンテナに供給する手段を有するダイバーシティー制御部と、 By controlling switching of said first and second single-pole double-throw frequency band changeover switch, the first and the signal of the first or second radio frequency band in the second receiving antenna respectively received determines the reception state, means for selecting a good radio frequency band of the receiving state as used radio frequency band, distribute the transmission signal of the selected used radio frequency band output from the transmitting unit in the power divider a diversity controller having a means for supplying to said first and second transmitting and receiving antennas and,
    を備えていることを特徴とする送受信ダイバーシティー回路。 Reception diversity circuit characterized in that it comprises.
  6. 前記単極双投型周波数帯切替えスイッチの一方の双投側端子は、当該単極双投型周波数帯切替えスイッチと接続された送受信アンテナで受信した前記第1の無線周波数帯の信号を、該送受信アンテナと対応して設けられた前記受信部へ通過させる手段、および前記送信部から前記第1の電力分配器を介して入力される第1の無線周波数帯の信号を前記送受信アンテナへ通過させる手段を有する第1のアンテナ共用器と接続され、前記単極双投型周波数帯切替えスイッチの他方の双投側端子は、当該単極双投型周波数帯切替えスイッチと接続された送受信アンテナで受信した前記第2の無線周波数帯の信号を、該送受信アンテナと対応して設けられた前記受信部へ通過させる手段、および前記送信部から前記第2の電力分配器を介して入力され The one double throw terminal of the single-pole double-throw band changeover switch, the signal of the first radio frequency band received by a single pole double throw type band switching transmission and reception antenna connected to the switch, the means for passing to the receiving unit provided in correspondence with the transmitting and receiving antennas, and passing the first radio frequency band of the signal input through the first power splitter from said transmitting unit to said receiving antenna is connected to the first antenna duplexer having means, the other double throw terminal of the single-pole double-throw band changeover switch, received in the single-pole double-throw frequency band switching transmission and reception antenna connected to the switch the signal of the second radio frequency band that is input via the said transmission reception antenna and means for passing to the receiving unit provided in correspondence, and the second power distributor from the transmission unit 第2の無線周波数帯の信号を前記送受信アンテナへ通過させる手段を有する第2のアンテナ共用器と接続されていることを特徴とする請求項5に記載の送受信ダイバーシティー回路。 Reception diversity circuit according to claim 5, characterized in that it is connected to the second antenna duplexer having means for passing signals in a second radio frequency band to the receiving antenna.
  7. 第1の無線周波数帯と、該無線周波数帯と異なる第2の無線周波数帯の双方で送受信可能な無線端末装置における送受信ダイバーシティー回路であって、 A first radio frequency band, a reception diversity circuit in both transmission and reception-enabled wireless terminal device of the second radio frequency band different from the radio frequency band,
    前記第1の無線周波数帯または第2の無線周波数帯の信号を送受信するN(N≧3)個の送受信アンテナと、 Said first radio frequency band or N for transmitting and receiving signals of the second radio frequency band (N ≧ 3) pieces of receiving antennas,
    前記N個の送受信アンテナと対応して設けられ、該送受信アンテナで受信された第1の無線周波数帯の信号をそれぞれ復調する第1の受信部と、 Provided corresponding to the N-number of reception antennas, a first receiving section for demodulating the signal of the first radio frequency band received by said transmission reception antenna, respectively,
    前記N個の送受信アンテナと対応して設けられ、該送受信アンテナで受信された第2の無線周波数帯の信号をそれぞれ復調する第2の受信部と、 Provided corresponding to the N-number of reception antennas, a second receiver for demodulating a signal of the second radio frequency band received by said transmission reception antenna, respectively,
    前記第1の無線周波数帯または第2の無線周波数帯の信号を送信信号として出力する送信部と、 A transmitting unit which outputs the first radio frequency band or signals of the second radio frequency band as the transmission signal,
    前記N個の送受信アンテナにそれぞれ接続されて、当該送受信アンテナを、前記第1の無線周波数帯の信号送受信用または前記第2の無線周波数帯の信号送受信用に切替えるN個の単極双投型周波数帯切替えスイッチと、 The N are connected respectively to the transmitting and receiving antenna, the transmitting and receiving antennas, the first of the N single-pole double-throw switch to signal transmission and reception for transmitting and receiving signals or the second radio frequency band of the radio frequency band and a switch switching frequency band,
    前記送信部から出力される前記第1の無線周波数帯の信号を、前記N個の送受信アンテナへ分配して送出する第1の電力N分配器と、 The signal of the first radio frequency band outputted from the transmitting unit, a first power N divider for sending and distributed to the N reception antennas,
    前記送信部から出力される前記第2の無線周波数帯の信号を、前記N個の送受信アンテナへ分配して送出する第2の電力N分配器と、 The signal of the second radio frequency band outputted from the transmitting unit, and a second power N divider for sending and distributed to the N reception antennas,
    前記N個の単極双投型周波数帯切替えスイッチを切替え制御することにより、前記N個の送受信アンテナで前記第1または第2の無線周波数帯の信号をそれぞれ受信して受信状態を判定し、受信状態の良好な無線周波数帯を使用無線周波数帯として選択する手段と、前記送信部から出力される前記選択された使用無線周波数帯の送信信号を前記電力N分配器で分配して前記N個の送受信アンテナに供給する手段を有するダイバーシティー制御部と、 Wherein the N number of controlling switching of the single-pole double-throw frequency band selector switch determines the N reception state signal receiving each of the transmission and reception antenna first or second radio frequency band, It means for selecting a good radio frequency band of the receiving state as used radio frequency band, the N transmission signals of the selected used radio frequency band output from the transmitting unit and partitioned the power N divider a diversity controller having a means for supplying the transmitting and receiving antennas,
    を備えていることを特徴とする送受信ダイバーシティー回路。 Reception diversity circuit characterized in that it comprises.
  8. 前記単極双投型周波数帯切替えスイッチの一方の双投側端子は、当該単極双投型周波数帯切替えスイッチと接続された送受信アンテナで受信した前記第1の無線周波数帯の信号を、該送受信アンテナと対応して設けられた前記受信部へ通過させる手段、および前記送信部から前記第1の電力N分配器を介して入力される第1の無線周波数帯の信号を前記送受信アンテナへ通過させる手段を有する第1のアンテナ共用器と接続され、前記単極双投型周波数帯切替えスイッチの他方の双投側端子は、当該単極双投型周波数帯切替えスイッチと接続された送受信アンテナで受信した前記第2の無線周波数帯の信号を、該送受信アンテナと対応して設けられた前記受信部へ通過させる手段、および前記送信部から前記第2の電力N分配器を介して入力 The one double throw terminal of the single-pole double-throw band changeover switch, the signal of the first radio frequency band received by a single pole double throw type band switching transmission and reception antenna connected to the switch, the passing means for passing to the receiving unit provided in correspondence with the transmitting and receiving antennas, and the first radio frequency band of the signal input through the first power N divider from the transmitting unit to the receiving antenna is connected to the first antenna duplexer having means for, the other double throw terminal of the single-pole double-throw band changeover switch is in the single-pole double-throw frequency band switching transmission and reception antenna connected to the switch received signal of the second radio frequency band, means for passing to the receiving unit provided in correspondence with said transmission reception antenna, and through the second power N divider from the transmission unit input れる第2の無線周波数帯の信号を前記送受信アンテナへ通過させる手段を有する第2のアンテナ共用器と接続されていることを特徴とする請求項7に記載の送受信ダイバーシティー回路。 Reception diversity circuit according to claim 7, characterized in that it is connected to the second antenna duplexer having means for passing signals in a second radio frequency band to the receiving antenna.
JP2006340308A 2006-12-18 2006-12-18 Reception diversity circuit Expired - Fee Related JP4765924B2 (en)

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US10020563B2 (en) 2010-11-05 2018-07-10 Apple Inc. Antenna system with antenna swapping and antenna tuning
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US9596330B2 (en) 2010-11-05 2017-03-14 Apple Inc. Antenna system with receiver diversity and tunable matching circuit
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