JPH01200726A - Antenna multicoupler - Google Patents
Antenna multicouplerInfo
- Publication number
- JPH01200726A JPH01200726A JP63024201A JP2420188A JPH01200726A JP H01200726 A JPH01200726 A JP H01200726A JP 63024201 A JP63024201 A JP 63024201A JP 2420188 A JP2420188 A JP 2420188A JP H01200726 A JPH01200726 A JP H01200726A
- Authority
- JP
- Japan
- Prior art keywords
- band
- transmission
- filter
- reception
- notch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 46
- 238000010295 mobile communication Methods 0.000 claims description 4
- 238000002955 isolation Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 8
- 239000003990 capacitor Substances 0.000 description 6
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
- Transceivers (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、送信周波数と受信周波数が互いに異２ページ
なシ、かつ送信と受信のアンテナを共用する移動用通信
装置、たとえば、自動車電話などに用いられるアンテナ
共用器に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is applicable to mobile communication devices, such as mobile telephones, in which the transmitting frequency and the receiving frequency are different from each other, and the transmitting and receiving antennas are shared. The present invention relates to an antenna duplexer.
従来の技術
従来、この種の自動車電話などの移動用通信装置に用い
られるアンテナ共用器は、第５図に示すように、２つの
バンドパスフィルタを、組み合わせて構成していた。す
なわち、送信端子１とアンテナ端子２の間には、送信帯
域が通過する送信用フィルタ３が設けられ、まだ、受信
端子４とアンテナ端子２の間には、受信帯域が通過する
受信用フィルタ５が設けられている。第６図に、従来の
アンテナ共用器の伝送特性を示す。送信帯域６と受信帯
域７がちシ、送信帯域６における受信帯域７のアイソレ
ーションは、ポイント８で表わされ、受信帯域７の送信
帯域６に対するアイソレーションは、ポイント９で表わ
される。2. Description of the Related Art Conventionally, antenna duplexers used in mobile communication devices such as car telephones of this type have been constructed by combining two bandpass filters, as shown in FIG. That is, a transmitting filter 3 through which the transmitting band passes is provided between the transmitting terminal 1 and the antenna terminal 2, and a receiving filter 5 through which the receiving band passes is provided between the receiving terminal 4 and the antenna terminal 2. is provided. FIG. 6 shows the transmission characteristics of a conventional antenna duplexer. When the transmission band 6 and the reception band 7 are different, the isolation of the reception band 7 in the transmission band 6 is represented by point 8, and the isolation of the reception band 7 with respect to the transmission band 6 is represented by point 9.
従来のアンテナ共用器では、送信帯域６及び受信帯域７
が広帯域の場合や、送信帯域６と受信帯域７が接近して
いる場合には、送受信のアイソレ３八−／
−ションポイントを犬きくとることが難しくなる。In the conventional antenna duplexer, transmission band 6 and reception band 7
When the transmitting band 6 and the receiving band 7 are close to each other, it becomes difficult to precisely maintain the isolation point for transmitting and receiving.
また、送信、受信の帯域が隣接しているようなときは、
送受信のアイソレーションをとることができなかった。Also, if the transmitting and receiving bands are adjacent,
It was not possible to isolate the transmission and reception.
発明が解決しようとする課題
本発明はこのような現状に鑑みなされたもので、送受信
のアイソレーションポイントにおける減衰量が大きくと
れるようにすることを目的とする。Problems to be Solved by the Invention The present invention was made in view of the current situation, and an object of the present invention is to increase the amount of attenuation at the transmission/reception isolation point.
課題を解決するだめの手段
本発明は、アンテナ共用器において、送信、受信フィル
タに、スイッチによって、ノツチフィルタをオン、オフ
して、必要な帯域での減衰量を大きくとるようにしたも
のである。Means for Solving the Problems The present invention is an antenna duplexer in which a switch is used to turn on and off a notch filter in the transmission and reception filters to increase the amount of attenuation in the necessary band. .
作用
この構成により、たとえば、受信側フィルタにおいて、
受信側低域、受信側高域に通過帯域を分割し、受信側低
域のときは、高域側にノツチフィルタを入れ、受信側高
域のときは、低域側にノツチフィルタを入れることで、
サイドバンドの減衰量を大きくかせぐことができる。全
く同じように、送信側も、送信側高域、送信側低域に分
割し、それぞれに、ノツチフィルタを入れることで、サ
イドバンドの減衰量を大きくかせぐことができる。Effect With this configuration, for example, in the receiving filter,
Divide the passband into a low band on the receiving side and a high band on the receiving side, and insert a notch filter on the high band side for the low band on the receiving side, and a notch filter on the low band side for the high band on the receiving side. in,
It is possible to increase the amount of attenuation of the sideband. In exactly the same way, by dividing the transmitting side into a transmitting high band and a transmitting low band and inserting a notch filter in each, it is possible to increase the amount of attenuation of the sideband.
このことによって、アンテナ共用器において、送受信の
アイソレーションポイントにおける減衰量が各帯域のサ
イドバンドから大きくとることが可能と々る。As a result, in the antenna duplexer, it is possible to increase the amount of attenuation at the transmission/reception isolation point from the sideband of each band.
実施例
第１図に本発明の一実施例のアンテナ共用器のブロック
図を示す。送信端子１１ば、送信フィルタ１４に接続さ
れ、並列にスイッチ１６を介して、送信ノツチフィルタ
１８が接続されている。受信端子１２は、受信フィルタ
１５に接続され、並列にスイッチ１６を介して、受信ノ
ツチフィルタ１８が接続されている。寸だ、アンテナ端
子１３は、送信フィルタ１４．受信フィルタ１５に接続
されている。Embodiment FIG. 1 shows a block diagram of an antenna duplexer according to an embodiment of the present invention. The transmission terminal 11 is connected to a transmission filter 14, and a transmission notch filter 18 is connected in parallel via a switch 16. The receiving terminal 12 is connected to a receiving filter 15, and a receiving notch filter 18 is connected in parallel via a switch 16. The antenna terminal 13 is connected to the transmission filter 14. It is connected to the reception filter 15.
第２図ａ、ｂに本実施例のアンテナ共用器の低域高域者
バンドの伝送特性を示す。第４図ａにおいて、送信帯域
１９は、送信帯域の低域側２１の５ヘー／
部分は通過するが、送信帯域の高域側２２は、受信ノツ
チ帯域２５の影響を受けて、通過域とはなっていない。FIGS. 2a and 2b show the transmission characteristics of the antenna duplexer of this embodiment in the low and high frequency bands. In FIG. 4a, the transmission band 19 passes a 5-h/m portion of the low-frequency side 21 of the transmission band, but the high-frequency side 22 of the transmission band is influenced by the reception notch band 25 and becomes a pass band. It's not.
しかし、受信帯域の低域側２３の減衰量は、大きくとる
ことができる。同様に受信帯域２０は、受信帯域低域側
２３．高域側２４を全て通過させているので、問題はな
い。捷た減衰量においては、送信帯域低域側２１の減衰
量２６が十分とれていれば良いので、送信帯域の高域側
２２の分だけ、周波数間隔が大きくとれるため高減衰量
を確保しやすい。寸だ、第４図すは、送信帯域２７の高
域側３０を通過させるときで、このときは、送信帯域の
低域側２９も通過域となる。しかし、このとき、受信帯
域２８における減衰量は、受信帯域の高域側３２で十分
とれていれば良いので、送信フィルタの受信帯域２８に
おける減衰量は、受信帯域高域側３２の減衰量３３が十
分とれていれば良いこととなる。これは、・受信帯域の
低域側３１の分だけ、周波数間隔が大きくとれるため高
減衰量を確保しやすい。受信帯域２８については、受信
帯域高域側３２ば、通過しなければな６ベーン
らないが、受信帯域低域側３１については、送信ノツチ
帯域３４の影響をうけて、通過域とはなっていない。し
かし、送信帯域の高域側の減衰量は大きくとることがで
きる。このように、送信帯域と受信帯域を２つの帯域に
わけて、それぞれにノツチフィルタを入れて、ノツチフ
ィルタをスイッチにて切り換えることによって、広帯域
の通過域をもつアンテナ共用器を簡単に実現することが
できる。However, the amount of attenuation on the lower side 23 of the reception band can be increased. Similarly, the reception band 20 is on the lower side of the reception band 23. Since all of the high frequency side 24 is passed through, there is no problem. Regarding the attenuation amount, it is sufficient to have a sufficient attenuation amount 26 on the lower side 21 of the transmission band, so it is easy to secure a high amount of attenuation because the frequency interval can be increased by the amount on the higher side 22 of the transmission band. . In Figure 4, the high frequency side 30 of the transmission band 27 is passed, and at this time, the low frequency side 29 of the transmission band also becomes a pass band. However, at this time, the amount of attenuation in the reception band 28 only needs to be sufficient on the high-frequency side 32 of the reception band, so the attenuation amount in the reception band 28 of the transmission filter is the attenuation amount 33 on the high-frequency side 32 of the reception band. It is a good thing if there is enough. This is because: - Since the frequency interval can be increased by the amount on the lower side 31 of the receiving band, it is easy to ensure a high amount of attenuation. Regarding the receiving band 28, there are no six vanes that must pass through the receiving band high band side 32, but the receiving band low band side 31 is affected by the transmitting notch band 34 and does not become a pass band. do not have. However, the amount of attenuation on the high frequency side of the transmission band can be increased. In this way, by dividing the transmitting band and the receiving band into two bands, inserting a notch filter in each band, and switching the notch filters with a switch, it is possible to easily realize an antenna duplexer with a wide passband. Can be done.
第３図に本発明の他の実施例のブロック図を示す。第３
図において、送信端子３５から送信フィルタ３８に接続
され、並列にスイッチ４０を介して、送信ノツチフィル
タ４２と、送信ノツチダミー回路４３が接続されている
。また、受信端子３６からは、受信フィルタ３９に接続
され、並列にスイッチ４１を介して、受信ノツチフィル
タ４５と受信ノツチダミー回路４４に接続されている。FIG. 3 shows a block diagram of another embodiment of the invention. Third
In the figure, a transmission terminal 35 is connected to a transmission filter 38, and a transmission notch filter 42 and a transmission notch dummy circuit 43 are connected in parallel via a switch 40. Further, the receiving terminal 36 is connected to a receiving filter 39, and is connected in parallel to a receiving notch filter 45 and a receiving notch dummy circuit 44 via a switch 41.
アンテナ端子３了は、受信フィルタ３９と送信フィルタ
３８に接続されている。送信ノツチフィルタ４２と送信
ノツチダミー回路４３及び、受信ノソ７／＼−７
チフイルタ３９と受信ノツチダミー回路４４の関係は、
ノツチフィルタがオンのときとオフのときのインピーダ
ンスが大きく変化しないだめのものであシ、オン、オフ
にかかわシなく、良好なフィルタ特性を得ることができ
る。The antenna terminal 3 is connected to a reception filter 39 and a transmission filter 38. The relationships between the transmitting notch filter 42 and the transmitting notch dummy circuit 43, and between the receiving nozzle 7/\-7 filter 39 and the receiving notch dummy circuit 44 are as follows.
The impedance of the notch filter does not change significantly between when it is on and when it is off, and good filter characteristics can be obtained regardless of whether it is on or off.
第４図は、本実施例によるアンテナ共用器の具体例を示
す回路図であり、送信端子４７から、送信フィルタ６１
、受信端子４８から受信フィルタ６２が接続され、各フ
ィルタ６１．６２は、可変コンデンサ４９を有する％λ
型の誘電体同軸共振−器５４を複数個、結合コンデンサ
５０を介して接続することにより構成されている。この
ような構成において、各フィルタ６１．６２の特性を満
足するように、誘電体同軸共振器５４の特性が設定され
るとともに、可変コンデンサ４９により調整される。ま
た、送信端子４７からは、送信フィルタ６１が接続され
るとともに、並列にリレー５１を介して、ノツチ結合コ
ンデンサ５２とノツチ共振器５３が直列にアースへ接続
されている。FIG. 4 is a circuit diagram showing a specific example of the antenna duplexer according to this embodiment.
, a reception filter 62 is connected from the reception terminal 48, and each filter 61.62 has a variable capacitor 49.
It is constructed by connecting a plurality of type dielectric coaxial resonators 54 via a coupling capacitor 50. In such a configuration, the characteristics of the dielectric coaxial resonator 54 are set and adjusted by the variable capacitor 49 so as to satisfy the characteristics of each filter 61, 62. Further, a transmission filter 61 is connected to the transmission terminal 47, and a notch coupling capacitor 52 and a notch resonator 53 are connected in series to ground via a relay 51 in parallel.
まだ、受信端子４８からは、受信フィルタ６２が接続さ
れるとともに並列にスイッチングダイオード５５を介し
て、ノツチ結合コンデンサ５７とノツチ共振器５８がア
ースへ直列に接続されている。また、スイッチングダイ
オード５５には、スイッチ電源端子６０よシ抵抗５６を
介して電源供給されている。まだ、リレー５１にも電源
端子６０よシミ源電圧が供給されている。スイッチ電源
端子６０には、また、高周波バイパスコンデンサ５９が
アースに対して接続されている。A receiving filter 62 is connected to the receiving terminal 48, and a notch coupling capacitor 57 and a notch resonator 58 are connected in series to ground via a switching diode 55 in parallel. Furthermore, power is supplied to the switching diode 55 via a switch power supply terminal 60 and a resistor 56 . The relay 51 is still supplied with the voltage source from the power supply terminal 60. The switch power supply terminal 60 is also connected to a high frequency bypass capacitor 59 to ground.
発明の効果
以上のように、本発明によれば、広帯域の通過帯域や、
送信と受信帯域の間隔のせまいアンテナ共用器として、
小型でかつ高性能のものを実現でき、移動用通信装置と
して小型化、高性能化を図ることができるものである。Effects of the Invention As described above, according to the present invention, a wide passband,
As an antenna duplexer with narrow spacing between transmitting and receiving bands,
It is possible to realize a compact and high-performance device, and it is possible to achieve miniaturization and high performance as a mobile communication device.
第１図は本発明の一実施例のアンテナ共用器のブロック
図、第２図ａ、ｂは同アンテナ共用器の伝送特性図、第
３図は本発明の他の実施例のブロック図、第４図は同ア
ンテナ共用器の具体例を示９１＼−ノ
す電気回路、第５図は従来のアンテナ共用器のブロック
図、第６図は従来のアンテナ共用器の伝送特性図である
。
１１．３５ ・・・送信端子、１２．３６ 受信
端子、１３，３了・・・アンテナ端子、１４．３８送信
フイルタ、１５．３９ 受信フィルタ、１６．４０
，４１−・・・スイッチ、１７．４２・送信ノツチフィ
ルタ、１８．４５ 受信ノツチフィルタ、４３
送信ノツチダミー回路、４４・・受信ノツチダミー回路
。 ・代理人の氏名 弁理士 中 尾 敏 男
ほか１名第２図
（α２
第３図FIG. 1 is a block diagram of an antenna duplexer according to an embodiment of the present invention, FIGS. 2a and 2b are transmission characteristic diagrams of the antenna duplexer, and FIG. 3 is a block diagram of another embodiment of the present invention. FIG. 4 shows an electric circuit showing a specific example of the antenna duplexer, FIG. 5 is a block diagram of a conventional antenna duplexer, and FIG. 6 is a transmission characteristic diagram of the conventional antenna duplexer. 11.35...Transmission terminal, 12.36 Receiving terminal, 13,3...Antenna terminal, 14.38 Transmission filter, 15.39 Reception filter, 16.40
, 41-...Switch, 17.42 Transmission notch filter, 18.45 Reception notch filter, 43
Transmission notch dummy circuit, 44...reception notch dummy circuit.・Name of agent: Patent attorney Toshio Nakao
Figure 2 (α2 Figure 3)
Claims (4)
ィルタを有し、送信フィルタ及び受信フィルタに、スイ
ッチにより切り換え可能なノッチフィルタを具備したこ
とを特徴とするアンテナ共用器。(1) An antenna duplexer characterized in that it has at least two filters on each of the transmitting side and the receiving side, and the transmitting filter and the receiving filter each include a notch filter that can be switched by a switch.
ダミー回路を接続した特許請求の範囲第１項記載のアン
テナ共用器。(2) The antenna duplexer according to claim 1, wherein a notch dummy circuit is connected in parallel to the notch filter via a switch.
電体同軸共振器により構成した特許請求の範囲第１項記
載のアンテナ共用器。(3) The antenna duplexer according to claim 1, wherein the transmission filter and the reception filter are constituted by 1/4λ type dielectric coaxial resonators.
いた移動用通信装置。(4) A mobile communication device using the antenna duplexer according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63024201A JPH01200726A (en) | 1988-02-04 | 1988-02-04 | Antenna multicoupler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63024201A JPH01200726A (en) | 1988-02-04 | 1988-02-04 | Antenna multicoupler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01200726A true JPH01200726A (en) | 1989-08-11 |
Family
ID=12131706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63024201A Pending JPH01200726A (en) | 1988-02-04 | 1988-02-04 | Antenna multicoupler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01200726A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0758821A2 (en) * | 1995-08-14 | 1997-02-19 | Matsushita Electric Industrial Co., Ltd. | Receiving circuit for a portable telephone set |
| JP2007134781A (en) * | 2005-11-08 | 2007-05-31 | Ntt Docomo Inc | Tunable resonator |
| US20170163244A1 (en) * | 2015-12-07 | 2017-06-08 | Handy International Co., Ltd. | Duplexer device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61214625A (en) * | 1985-03-19 | 1986-09-24 | Tokyo Electric Co Ltd | Antenna coupling circuit |
-
1988
- 1988-02-04 JP JP63024201A patent/JPH01200726A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61214625A (en) * | 1985-03-19 | 1986-09-24 | Tokyo Electric Co Ltd | Antenna coupling circuit |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0758821A2 (en) * | 1995-08-14 | 1997-02-19 | Matsushita Electric Industrial Co., Ltd. | Receiving circuit for a portable telephone set |
| EP0758821A3 (en) * | 1995-08-14 | 2001-07-18 | Matsushita Electric Industrial Co., Ltd. | Receiving circuit for a portable telephone set |
| JP2007134781A (en) * | 2005-11-08 | 2007-05-31 | Ntt Docomo Inc | Tunable resonator |
| US7825754B2 (en) | 2005-11-08 | 2010-11-02 | Ntt Docomo, Inc. | Variable resonator |
| US20170163244A1 (en) * | 2015-12-07 | 2017-06-08 | Handy International Co., Ltd. | Duplexer device |
| KR20170066997A (en) * | 2015-12-07 | 2017-06-15 | 가부시키가이샤 핸디인터네셔널 | Duplexer device |
| CN107040238A (en) * | 2015-12-07 | 2017-08-11 | Handy国际株式会社 | Diplexer device |
| US10236862B2 (en) * | 2015-12-07 | 2019-03-19 | Wisol Japan Co, Ltd. | Duplexer device |
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