JPS5958925A - Antenna diversity system - Google Patents
Antenna diversity systemInfo
- Publication number
- JPS5958925A JPS5958925A JP57170481A JP17048182A JPS5958925A JP S5958925 A JPS5958925 A JP S5958925A JP 57170481 A JP57170481 A JP 57170481A JP 17048182 A JP17048182 A JP 17048182A JP S5958925 A JPS5958925 A JP S5958925A
- Authority
- JP
- Japan
- Prior art keywords
- output voltage
- antenna
- tuning
- antenna diversity
- circuit
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
- H04B7/0805—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with single receiver and antenna switching
- H04B7/0814—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with single receiver and antenna switching based on current reception conditions, e.g. switching to different antenna when signal level is below threshold
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
- H04B7/0831—Compensation of the diversity switching process for non-uniform properties or faulty operations of the switches used in the diversity switching process
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Radio Transmission System (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、同調点付近でのチューニングのフィーリング
を改善するためなされたアンテナ・ダイバシテイ・シス
テムに関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an antenna diversity system designed to improve the feel of tuning near a tuning point.
複数のアンテナを具備し、受信電界強度に応じていずれ
かのアンテナを選択するように構成したアンテナ・ダイ
パシテイ・システムがＦ Ｍ受信機に採用されている。An FM receiver employs an antenna diversity system that is equipped with a plurality of antennas and is configured to select one of the antennas depending on the received field strength.
第１図は従来のアンテナ・ダイバシテイ・システムな示
すプーンク図で、ｌａ、ｌｂはアンテナ、２はアンテナ
切換回路、３はフロントエンド部、４は中間周波増幅段
、５は検波段、６はシグナルメータ、７はアンテナ・ダ
イバシテイ・コントロール回路、８は切換スイッチであ
る。Figure 1 is a Poonck diagram showing a conventional antenna diversity system, where la and lb are antennas, 2 is an antenna switching circuit, 3 is a front end section, 4 is an intermediate frequency amplification stage, 5 is a detection stage, and 6 is a signal 7 is an antenna diversity control circuit, and 8 is a changeover switch.
以上において従来システムでは上記中間周波増幅段４か
ら取り出された電界強度に比例した直流電圧をシグナル
メータ６で読み取り、このシグナルメータ出力電圧に応
じて切換スイッチ８をオンさせ、アンテナ・ダイバシテ
イ会コントロール回路゛７を動作させることによりアン
テナ切換回路２によってアンテナを切り換えるように構
成している。In the conventional system described above, the signal meter 6 reads the DC voltage proportional to the electric field strength taken out from the intermediate frequency amplification stage 4, turns on the changeover switch 8 according to this signal meter output voltage, and controls the antenna diversity control circuit. The antenna switching circuit 2 is configured to switch the antenna by operating the antenna 7.
ところでこのようなシステムでは、受信機の正同調点の
みならず離調した状態でもアンテナ切換回路を動作させ
るようにしていたため、同調点付近でのチューニングの
フィーリングに違和感を生じさせるようになる。また切
換の誤動作により異常発振を引ぎ起こ丁ような場合もあ
った。However, in such a system, the antenna switching circuit is operated not only at the correct tuning point of the receiver but also when the receiver is out of tune, which results in an unnatural feeling of tuning near the tuning point. There have also been cases where switching malfunctions have caused abnormal oscillations.
本発明は以上の観点からなされたもので、中間周波増幅
段から取り出されるシグナルメータ出力電圧が一定レベ
ル以上で、かつ検波段から取り出されるチューニングメ
ータ出力電圧が特定範囲内の時のみアンテナ・ダイバシ
テイ争コントロール回路を動作させるように構成するこ
とにより従来欠点を除去するようにしたアンテナ・ダイ
パシテイ・システムを提供することを目的とするもので
ある。以下図面を斜、照して本発明実施例を説明する。The present invention has been made from the above point of view, and the antenna diversity contest occurs only when the signal meter output voltage taken out from the intermediate frequency amplification stage is above a certain level and the tuning meter output voltage taken out from the detection stage is within a specific range. It is an object of the present invention to provide an antenna diversity system which eliminates the conventional drawbacks by configuring the control circuit to operate. Embodiments of the present invention will be described below with diagonal reference to the drawings.
第２図は本発明実施例によるアンテナ・グイバシテイ・
システムを示すブロック図で第１図と同一部分は同一番
号で示し、９は検波段５に接続されたチューニングメー
タ、１０はトランジスタ、１】はスイッチ制御回路であ
る。スイッチ制御回路１】はア′フ゛Ａ１・ Ａ２．Ａ
３、アンド回路ＡＮＤ１゜ＡＮＤ２を含んでいる。FIG. 2 shows the antenna privacy according to the embodiment of the present invention.
In the block diagram showing the system, the same parts as in FIG. 1 are designated by the same numbers, 9 is a tuning meter connected to the detection stage 5, 10 is a transistor, and 1 is a switch control circuit. The switch control circuit 1] is connected to the amplifiers A1 and A2. A
3. Contains AND circuits AND1 and AND2.
以上において、上記チューニングメータ９からの出力電
圧はウィンドコンパレータを構成するアンプＡｌ ＋
”２に加えられ、上記出力電圧が特定範囲内（同調点
からのずれが成る周波数以下）にあるときのみアンプＡ
ｌ ｅ Ａ２から各々一定の出力がアンド回路ＡＮＤ
１に加えられ、アンド回路ＡＮＤ。In the above, the output voltage from the tuning meter 9 is the amplifier Al + which constitutes the window comparator.
2, and only when the above output voltage is within a specific range (below the frequency at which the deviation from the tuning point occurs)
l e Each constant output from A2 is an AND circuit AND
Added to 1, AND circuit AND.
からの出力は他のアンド回路ＡＮＪＪ２に加えられる。The output from is added to another AND circuit ANJJ2.
一方、シグナルメータ６からの出力電圧はアンプＡ３に
加えられ、上記出力電圧が一定レベル以上の時のみアン
プＡ３からの出力がアンド回路ＡＮＤ２に加えられる。On the other hand, the output voltage from the signal meter 6 is applied to the amplifier A3, and only when the output voltage is above a certain level, the output from the amplifier A3 is applied to the AND circuit AND2.
したがって上記のようにシグナルメータ出力電圧が一定
レベル以上で、かつチューニングメータ出力電圧が特定
範囲内の時のみ上記アンド回路ＡＮＩ）２から出力がな
されてトランジスタ■０に加えられる。Therefore, as described above, only when the signal meter output voltage is above a certain level and the tuning meter output voltage is within a specific range, an output is made from the AND circuit ANI)2 and applied to the transistor 0.
これによりトランジスタ１０はオンし、アンテナ・ダイ
バシテイ・コントロール回路７を動作させることにより
アンテナ切換回路２を働かせるので、アンテナの切換が
行われるようになる。As a result, the transistor 10 is turned on and the antenna diversity control circuit 7 is activated, thereby causing the antenna switching circuit 2 to function, so that the antenna can be switched.
第３図は本発明の具体的実施例を示すもので、第２図に
おけるスイッチ制御回路１】を中間周波増幅段および検
波段を含むＩＣ１２内に含−１：セる→（集積化させる
）ように構成した例を示すものである。FIG. 3 shows a specific embodiment of the present invention, in which the switch control circuit 1 shown in FIG. 2 is included in an IC 12 including an intermediate frequency amplification stage and a detection stage. This shows an example of such a configuration.
以上述べて明らかなように本発明によれば、中間周波増
幅段から取り出されるシグナルメータ出力電圧が一定レ
ベル以上で、かつ検波段から取り出でれるチューニング
メータ出力電圧が特定範囲内の時のみアンテナ・ダイバ
シティーコントロール回路を動作させるように構成した
ものであるから、正四調点あるいはこの伺近でのみ正確
にアンテナの切り換えが行われるのでチューニングのフ
ィーリングを改善することができる。As is clear from the above description, according to the present invention, the antenna is used only when the signal meter output voltage taken out from the intermediate frequency amplification stage is above a certain level and the tuning meter output voltage taken out from the detection stage is within a specific range. - Since it is configured to operate a diversity control circuit, the antenna can be switched accurately only at or near the positive four-tone point, which improves the feeling of tuning.
また切換の誤動作も避けられるので異常発振の発生を防
止することができる。Furthermore, since malfunctions in switching can also be avoided, abnormal oscillations can be prevented from occurring.
第１図は従来例を示すブロック図、第２図および第３図
は共に本発明実施例を示すブロック図である。
２・・・アンテナ切換回路、４・・・中間周波増幅段、
５・・・検波段、６・・・シグナルメータ、７・・・ア
ンテナ・ダイバシテイ・コントロール回路、８・・・ス
イフチ、９・・・チューニングメータ、１０・・・トラ
ンジスタ、１１・・−スイッチ制御回路、Ａ１〜Ａ３・
・・アンプ、ＡＮＩ）１゜ＡＮＤ２・・・アンド回路。
特許出頼人 タラリオン株式会社
°Ｉ（却FIG. 1 is a block diagram showing a conventional example, and FIGS. 2 and 3 are block diagrams showing an embodiment of the present invention. 2... Antenna switching circuit, 4... Intermediate frequency amplification stage,
5...Detection stage, 6...Signal meter, 7...Antenna diversity control circuit, 8...Swift switch, 9...Tuning meter, 10...Transistor, 11...-Switch control Circuit, A1-A3・
...Amplifier, ANI)1゜AND2...AND circuit. Patent source Tararion Co., Ltd.
Claims (1)
圧が一定レベル以上で、かつ検波段から取り出されるチ
ューニングメータ出力電圧が特定範囲内の時のみアンテ
ナ・ダイバシテイ・コントロール回路を動作させるよう
に構成したことを特徴とするアンテナ・ダイバシテイ・
システノ・。The antenna diversity control circuit is configured to operate only when the signal meter output voltage taken out from the intermediate frequency amplification stage is above a certain level and the tuning meter output voltage taken out from the detection stage is within a specific range. Antenna diversity
Cisteno.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57170481A JPS5958925A (en) | 1982-09-28 | 1982-09-28 | Antenna diversity system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57170481A JPS5958925A (en) | 1982-09-28 | 1982-09-28 | Antenna diversity system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5958925A true JPS5958925A (en) | 1984-04-04 |
Family
ID=15905744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57170481A Pending JPS5958925A (en) | 1982-09-28 | 1982-09-28 | Antenna diversity system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5958925A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05267919A (en) * | 1991-12-26 | 1993-10-15 | Samsung Electron Co Ltd | Antenna moving device and its method |
-
1982
- 1982-09-28 JP JP57170481A patent/JPS5958925A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05267919A (en) * | 1991-12-26 | 1993-10-15 | Samsung Electron Co Ltd | Antenna moving device and its method |
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