JPS6035311Y2 - Transmission/reception duplexer - Google Patents
Transmission/reception duplexerInfo
- Publication number
- JPS6035311Y2 JPS6035311Y2 JP1978087775U JP8777578U JPS6035311Y2 JP S6035311 Y2 JPS6035311 Y2 JP S6035311Y2 JP 1978087775 U JP1978087775 U JP 1978087775U JP 8777578 U JP8777578 U JP 8777578U JP S6035311 Y2 JPS6035311 Y2 JP S6035311Y2
- Authority
- JP
- Japan
- Prior art keywords
- ports
- band
- port
- filter
- transmitting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Details Of Aerials (AREA)
- Transceivers (AREA)
Description
【考案の詳細な説明】
この考案は1つのアンテナで送信波及び受信波を共用す
る送受アンテナ共用方式において送信波と受信波とを分
離するための送受分波器に関するものである。[Detailed Description of the Invention] This invention relates to a transmitting/receiving duplexer for separating transmitting waves and receiving waves in a transmitting/receiving antenna shared system in which transmitting waves and receiving waves are shared by one antenna.
VHF帯及びUHF帯の同時送受波方式移動通信機に用
いられている従来の送受分波器は第1図に示す構成とさ
れていた。A conventional transmitter/receiver duplexer used in a mobile communication device that uses simultaneous wave transmission and reception in the VHF band and UHF band has the configuration shown in FIG.
Y形す−キュレータ11の端子12に送信帯域通過フィ
ルタ13及びアイソレータ14を経由して送信機15が
接続される。A transmitter 15 is connected to a terminal 12 of the Y-shaped curator 11 via a transmission bandpass filter 13 and an isolator 14.
サーキュレータ11の端子12に対して順方向の隣りの
端子16に送受共用アンテナ17が接続され、他の端子
18に受信帯域通過フィルタ19を経由して受信機21
が接続されていた。A transmitting/receiving antenna 17 is connected to a terminal 16 adjacent to the terminal 12 of the circulator 11 in the forward direction, and a receiver 21 is connected to the other terminal 18 via a receiving bandpass filter 19.
was connected.
この従来の送受分波器においては送受共用アンテナ17
のインピーダンス整合が不十分であるとその不整合に伴
う反射電力がすべて受信機側18に回り込むため、Y形
す−キュレータ11の見掛は上の逆方向結合減衰量が著
しく劣化する。In this conventional transmitting and receiving duplexer, the transmitting and receiving antenna 17
If the impedance matching is insufficient, all of the reflected power due to the mismatch will go around to the receiver side 18, so that the apparent reverse coupling attenuation of the Y-shaped curator 11 will be significantly degraded.
そのため送信機15で発生する側帯波状雑音中の受信帯
域の成分が受信機21に回り込むのを阻止するには送信
帯域通過フィルタ13の段数を多くする必要があった。Therefore, in order to prevent the reception band components of the sideband noise generated by the transmitter 15 from reaching the receiver 21, it is necessary to increase the number of stages of the transmission bandpass filter 13.
また送信波そのものが受信機21に回り込むのを阻止す
るために受信帯域通過フィルタ19の段数を多くする必
要があった。Furthermore, in order to prevent the transmitted wave itself from going around to the receiver 21, it was necessary to increase the number of stages of the reception bandpass filter 19.
このようにこれ等フィルタ13.19を多段にすること
は容積がかさみかつ高価となる欠点を伴なった。Having multiple stages of these filters 13, 19 in this manner has the disadvantage of increasing volume and cost.
この考案はこのような欠点を除去するために、Y形す−
キュレータの代りに、受信帯域に同調された方向性フィ
ルタを用いて、送受共用アンテナのインピーダンス不整
合に伴う送受俗間結合減衰量の劣化を改善し、送受信者
々の帯域通過フィルタの負担を軽くする送受分波器を提
供するものである。In order to eliminate these drawbacks, this invention has a Y-shaped structure.
Instead of a curator, a directional filter tuned to the receiving band is used to improve the deterioration of the coupling attenuation between transmitting and receiving due to the impedance mismatch of the transmitting and receiving antenna, and to reduce the burden on the bandpass filters of transmitters and receivers. The purpose of the present invention is to provide a transmitting/receiving duplexer.
第2図はこの考案による送受分波器の一例を示し、第1
図と対応する部分には同一符号を付けである。Figure 2 shows an example of a transmitter/receiver duplexer based on this invention.
Parts corresponding to those in the figure are given the same reference numerals.
この考案では受信機21の受信帯域frに同調した方向
性フィルタ22が設けられる。In this invention, a directional filter 22 tuned to the reception band fr of the receiver 21 is provided.
方向性フィルタ22は第1〜第4ポート23〜26を持
ち、第1及び第2ポート23及び24間、また第3及び
第4ポート25及び26間はそれぞれ第3図に曲線27
として示すように、特定の帯域f。The directional filter 22 has first to fourth ports 23 to 26, and a curve 27 is shown in FIG. 3 between the first and second ports 23 and 24 and between the third and fourth ports 25 and 26.
A specific band f, as shown as .
で帯域通過フィルタ特性を示す。shows the bandpass filter characteristics.
第1及び第4ポート23及び26間、また第2及び第3
ポート24及び25間はそれぞれ第3図の曲線28に示
すように特定の帯域f。between the first and fourth ports 23 and 26, and between the second and third ports
Ports 24 and 25 each have a specific band f as shown by curve 28 in FIG.
で帯域阻止フィルタ特性を示す。shows the band-stop filter characteristics.
更に第1及び第3ポート23及び25間、また第2及び
第4ポート24及び26間はそれぞれ第3図の曲線29
に示すように大きな結合減衰特性を示す。Further, between the first and third ports 23 and 25, and between the second and fourth ports 24 and 26, the curve 29 in FIG.
It exhibits large coupling attenuation characteristics as shown in .
この方向性フィルタ22は受信帯域f、に同調するよう
につまりf。This directional filter 22 is tuned to receive band f, that is, f.
=f、選定される。方向性フィルタ22は第3図に示す
特性のものならば各種のものを用いることができるが、
第2図ではストリップ線で構成した場合で方形リング状
の導体31の一対の対向辺に入出力線32及び33がそ
れぞれ結合されて構成される。=f, selected. Various types of directional filter 22 can be used as long as they have the characteristics shown in FIG.
In FIG. 2, the input/output lines 32 and 33 on opposite sides of a rectangular ring-shaped conductor 31 are connected to each other in the case of a strip line.
入出力線32.33の各両端がそれぞれポートとされ、
リング状導体31の長さによりフィルタの同調周波数ち
が決定される。Both ends of the input/output lines 32 and 33 are respectively ports,
The length of the ring-shaped conductor 31 determines the tuning frequency of the filter.
第1ポート23に送信帯域通過フィルタ13、アイソレ
ータ14を通じて送信機15が接続される。A transmitter 15 is connected to the first port 23 through a transmission bandpass filter 13 and an isolator 14 .
第2ポート24に無反射終端器34が接続され、第3ポ
ート25に受信帯域通過フィルタ19を通じて受信機2
1が接続され、第4ポート26に送受共用アンテナ17
が接続される。A non-reflection terminator 34 is connected to the second port 24, and a receiver 2 is connected to the third port 25 through a reception bandpass filter 19.
1 is connected to the fourth port 26, and a transmitting/receiving antenna 17 is connected to the fourth port 26.
is connected.
この第2図に示した構成によると、送信機15の送信波
は、方向性フィルタ22の共振周波数f。According to the configuration shown in FIG. 2, the transmitted wave of the transmitter 15 has the resonant frequency f of the directional filter 22.
=frから離調しているので、帯域阻止フィルタ特性2
8による損失をほとんど受けることなしに送受共用アン
テナ17に供給される。Since it is detuned from = fr, the band rejection filter characteristic 2
The signal is supplied to the transmitting/receiving antenna 17 with almost no loss caused by the transmitting/receiving signal.
また送受共用アンテナ17で受信された受信波は、方向
性フィルタ22に同調しているため、帯域通過フィルタ
特性27に従ってほとんど損失なしに受信機21に供給
される。Further, since the received wave received by the transmitting/receiving antenna 17 is tuned to the directional filter 22, it is supplied to the receiver 21 with almost no loss according to the bandpass filter characteristic 27.
一方、送信機15で発生した側帯波状雑音のうち、受信
帯域21に落ちる雑音成分はポート23.24間の帯域
通過フィルタ特性27によってポート24に達した後、
無反射終端器34に吸収され、一方アンテナ17側を通
じて受信機21への回り込みはポート23.26間の帯
域阻止フィルタ特性28により減衰され、受信機21に
は達しない。On the other hand, among the sideband noise generated in the transmitter 15, the noise component falling in the reception band 21 reaches the port 24 due to the bandpass filter characteristic 27 between the ports 23 and 24, and then
It is absorbed by the non-reflection terminator 34, and on the other hand, the loopback to the receiver 21 through the antenna 17 side is attenuated by the band rejection filter characteristic 28 between the ports 23 and 26, and does not reach the receiver 21.
送受共用アンテナ17のインピーダンス不整合に伴う送
信反射波中のポート23に戻るものはアイソレータ14
に吸収され、一方ポート26,25間の帯域通過フィル
タ特性27により減衰され、受信機21側にはほとんど
回り込まない。The part of the transmitted reflected wave that returns to the port 23 due to the impedance mismatch of the transmitting and receiving antenna 17 is the isolator 14.
On the other hand, it is attenuated by the band-pass filter characteristic 27 between the ports 26 and 25, and almost never reaches the receiver 21 side.
更にスーパーヘテロゲイン受信機の場合問題となるイメ
ージスプリアスに対しても、分波器22自体で受信帯域
通過フィルタ特性27を具備しているので中間周波数の
2倍だけ離調したイメージ波は、受信機21側に回り込
む前に十分減衰される。Furthermore, regarding image spurious which is a problem in the case of a super-hetero gain receiver, since the demultiplexer 22 itself has reception bandpass filter characteristics 27, image waves detuned by twice the intermediate frequency can be received. It is sufficiently attenuated before going around to the aircraft 21 side.
なおこの送受分波動作にはアイソレータ14は必ずしも
必要としない。Note that the isolator 14 is not necessarily required for this transmission/reception division operation.
以上説明したように、この考案の送受分波器によれば、
方向性フィルタを用いることにより、たとえ送受共用ア
ンテナのインピーダンス整合が不十分であっても、側帯
波状雑音、送信波ともに受信機側にほとんど回り込まな
いので、送受分波器そのものの送受俗間結合減衰量は劣
化せず、非常に大きな減衰量を得ることができる。As explained above, according to the transmitter/receiver duplexer of this invention,
By using a directional filter, even if the impedance matching of the transmitting/receiving antenna is insufficient, both sideband noise and the transmitted wave will hardly go around to the receiver side, so the coupling attenuation between the transmitting and receiving duplexer itself will be reduced. The amount of attenuation does not deteriorate and a very large amount of attenuation can be obtained.
また、帯域外の妨害波に対しても分波器自体のフィルタ
特性で十分減衰させることができる。Furthermore, interference waves outside the band can be sufficiently attenuated by the filter characteristics of the duplexer itself.
したがって送信及び受信帯域通過フィルタ13及び19
の負担を著しく軽減できる利点があり、その構成段数を
少なく、小さなものと構成でき、例えばVHF帯、UH
F帯の移動通信方式における移動機内での占有容積率の
大きな通過帯域フィルタを小型にできる。Therefore transmit and receive bandpass filters 13 and 19
It has the advantage of significantly reducing the burden on
A passband filter that occupies a large area in a mobile device in an F-band mobile communication system can be made smaller.
第1図は従来の送受分波器を示すブロック図、第2図は
この考案による送受分波器の一実施例を示すブロック図
、第3図は第2図の方向性フィルタの伝送特性曲線図で
ある。
13・・・・・・送信帯域通過フィルタ、14・・・・
・・アイソレータ、15・・・・・・送信機、17・・
・・・・送受共用アンテナ、19・・・・・・受信帯域
通過フィルタ、21・・・・・・受信機、22・・・・
・・方向性フィルタ、23〜26・・・・・・第1〜第
4ポート、34・・・・・・終端端子。Figure 1 is a block diagram showing a conventional transmission/reception duplexer, Figure 2 is a block diagram showing an embodiment of the transmission/reception duplexer according to this invention, and Figure 3 is a transmission characteristic curve of the directional filter shown in Figure 2. It is a diagram. 13... Transmission band pass filter, 14...
...Isolator, 15...Transmitter, 17...
...... Transmission and reception antenna, 19... Reception band pass filter, 21... Receiver, 22...
... Directional filter, 23 to 26... First to fourth ports, 34... Terminating terminal.
Claims (1)
第3及び第4ポート間は特定の周波数帯においてそれぞ
れ帯域通過ろ波特性を示し、第1及び第4ポート間、ま
た第2及び第3ポート間はそれぞれ上記特定の周波数帯
において、帯域阻止ろ波特性を示す方向性フィルタが設
けられ、上記第1ポートに送信帯域通過フィルタを通じ
て送信機が接続され、上記第2ポートに無反射終端器が
接続され、上記第3ポートに受信帯域通過フィルタを通
じて受信機が接続され、上記第4ポートに送受共用アン
テナが接続され、上記特定の周波数帯が上記受信機の受
信帯域になるように上記方向性フィルタの特性が選定さ
れてなる送受分波器。It has 1st to 4th ports, and between the 1st and 2nd ports and between the 3rd and 4th ports each exhibits bandpass filtering characteristics in a specific frequency band, and between the 1st and 4th ports, and between the 3rd and 4th ports. A directional filter exhibiting band-stop filtering characteristics in the specific frequency band is provided between the second and third ports, a transmitter is connected to the first port through a transmission band-pass filter, and a transmitter is connected to the first port through a transmission band-pass filter. A non-reflection terminator is connected to the port, a receiver is connected to the third port through a reception bandpass filter, a transmitting/receiving antenna is connected to the fourth port, and the specific frequency band is the receiving band of the receiver. A transmitting/receiving duplexer in which the characteristics of the directional filter are selected so that the following characteristics are obtained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1978087775U JPS6035311Y2 (en) | 1978-06-24 | 1978-06-24 | Transmission/reception duplexer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1978087775U JPS6035311Y2 (en) | 1978-06-24 | 1978-06-24 | Transmission/reception duplexer |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS555624U JPS555624U (en) | 1980-01-14 |
JPS6035311Y2 true JPS6035311Y2 (en) | 1985-10-21 |
Family
ID=29013622
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1978087775U Expired JPS6035311Y2 (en) | 1978-06-24 | 1978-06-24 | Transmission/reception duplexer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6035311Y2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2627395B2 (en) * | 1994-03-15 | 1997-07-02 | 日本昇降機メンテナンス株式会社 | Multi-level parking device |
CN1132326C (en) * | 1999-02-24 | 2003-12-24 | 三菱电机株式会社 | Radio terminal device |
-
1978
- 1978-06-24 JP JP1978087775U patent/JPS6035311Y2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS555624U (en) | 1980-01-14 |
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