JPS5815302A - Antenna device - Google Patents
Antenna deviceInfo
- Publication number
- JPS5815302A JPS5815302A JP11392581A JP11392581A JPS5815302A JP S5815302 A JPS5815302 A JP S5815302A JP 11392581 A JP11392581 A JP 11392581A JP 11392581 A JP11392581 A JP 11392581A JP S5815302 A JPS5815302 A JP S5815302A
- Authority
- JP
- Japan
- Prior art keywords
- tuning
- coils
- antenna device
- ferrite core
- matching
- 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
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
- H01Q7/06—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with core of ferromagnetic material
- H01Q7/08—Ferrite rod or like elongated core
Abstract
Description
【発明の詳細な説明】
本発明はフェライトコアに同調コイルを配設することに
より構成されるアンテナ装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an antenna device constructed by disposing a tuning coil in a ferrite core.
従来のこの種のアンテナ装置では、第１図ａ。A conventional antenna device of this type is shown in FIG. 1a.
ｂに示すように、１個のフェライトコア１に１個の同調
コイル２とマツチング用コイル３とを磁気的に結合して
配設した構成した構造である。なおアンテナ装置からの
信号を増幅する増幅素子として、電界効果形トランジス
タのよシに入力インピーダンスの大きい素子を使用する
場合は、マツチング用コイル３が省略されることがある
。また。As shown in FIG. 3B, the structure is such that one ferrite core 1 is provided with one tuning coil 2 and one matching coil 3 magnetically coupled to each other. Note that when an element with a large input impedance, such as a field effect transistor, is used as an amplification element for amplifying a signal from the antenna device, the matching coil 3 may be omitted. Also.
外部アンテナと併用している機器においては、外。For equipment that is used in conjunction with an external antenna:
部アン・テナ用コイルを配設する場合もある。In some cases, a coil for the antenna antenna is installed.
ところが、このようなアンテナ装置においては。However, in such an antenna device.
通過帯域幅が同調コイル２の選択度Ｑで決定され、帯域
特性を任意に設定することが不可能であり。The passband width is determined by the selectivity Q of the tuning coil 2, and it is impossible to arbitrarily set the band characteristics.
高忠実度受信機に必要とされる広帯域特性を実現するた
めに、帯域幅を広くしようとした場合には、感度が低下
してしまうという欠点が生じていた。When attempting to widen the bandwidth in order to achieve the wideband characteristics required for high-fidelity receivers, the disadvantage is that sensitivity decreases.
本発明はこのような従来の欠点を解決中るものであり、
感度を低下させることなく通過帯域特性を任意に設定で
きるようにすることを目的とするものである。The present invention solves these conventional drawbacks,
The purpose of this is to enable the passband characteristics to be set arbitrarily without reducing sensitivity.
本発明においては、１個のフェライトコアに詞−周波数
の電波を受信するだめの同調コイルを複数個配設したも
のであり、この構成によって複数個の同調コイルの同調
特性を合成したものがアンテナ装置の同調特性とガる。In the present invention, a single ferrite core is provided with a plurality of tuning coils for receiving radio waves of different frequencies, and with this configuration, the antenna is a combination of the tuning characteristics of the plurality of tuning coils. The tuning characteristics of the device.
以下１本発明の一実施例を示す第２図〜第４図の図面を
用いて説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be explained below using the drawings of FIGS. 2 to 4.
第２図ａ、、ｂに本発明の一実施例によるアンテナ装置
を示してかり、図において１０は棒状のフライトコア、
１１．１１’ はこのフェライトコア１ｏに配設され
た同調コイル＠ １２ 、１２’ はこの同調コイル
１１．１１’ に磁気的に結合して前記フェライトコア
１０に配設したマツチング用コイルである。Figures 2a and 2b show an antenna device according to an embodiment of the present invention, in which 10 is a rod-shaped flight core;
Reference numeral 11.11' denotes a tuning coil @ 12 disposed on the ferrite core 1o, and 12' is a matching coil disposed on the ferrite core 10, which is magnetically coupled to the tuning coil 11.11'.
そして、このようなアンテナ装置は、第３図に示すよう
にマツチング用コイル１２ 、１２’ それぞれから得
られる信号がインピーダンス素子１３゜１３′を介して
増幅素子１４に入力されるよう、に回路に接続される。In such an antenna device, as shown in FIG. 3, the circuit is designed such that the signals obtained from the matching coils 12 and 12' are input to the amplifying element 14 via the impedance elements 13 and 13'. Connected.
第４図に本発明によるアンテナ装置の同調コイル１１
、１’ｌ’ をスタガ一方式で調整した場合の同調特
性を示している。FIG. 4 shows a tuning coil 11 of an antenna device according to the present invention.
, 1'l' are adjusted using a staggered method.
この第４図から明らかなように、同調コイル１１゜１１
′ の選択度Ｑを少しずらせておくことにより。As is clear from this Fig. 4, the tuning coil 11°11
By slightly shifting the selectivity Q of ′.
通過帯域幅を広げることができ、また感度も若干高める
ことができる。The passband width can be widened, and the sensitivity can also be slightly increased.
以上のように本発明のアンテナ装置によればイ感度を低
下させることなく、任意の通過帯域特性を得ることがで
きるという効果が得られる。As described above, according to the antenna device of the present invention, it is possible to obtain an arbitrary passband characteristic without reducing the sensitivity.
第１図ａ、ｂは従来のアンテナ装置を示す平面図および
等価回路図、第２図ａ、ｂは本発明の一実施例によるア
ンテナ装置を示す平面図および等価回路図、第３図は同
アンテナ装置の使用例を示す回路図、第４図は同装置の
同調特性図である。
１ｏ・・・・・・フェライトコア、１１．１１’ ・・
・・・・同調コイル。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第Ａ
ｌｌ
第 ２ 図
３！１１1A and 1B are a plan view and an equivalent circuit diagram showing a conventional antenna device, FIGS. 2A and 2B are a plan view and an equivalent circuit diagram showing an antenna device according to an embodiment of the present invention, and FIG. A circuit diagram showing an example of the use of the antenna device, and FIG. 4 is a tuning characteristic diagram of the device. 1o... Ferrite core, 11.11'...
...tuned coil. Name of agent: Patent attorney Toshio Nakao and 1 other person No.A
ll No. 2 Figure 3!11
Claims (1)
だめの同調コイルを複数個配設したことを特徴とするア
ンテナ装置。An antenna device characterized in that a single ferrite core is provided with a plurality of tuning coils for receiving all radio waves of the same frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11392581A JPS5815302A (en) | 1981-07-20 | 1981-07-20 | Antenna device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11392581A JPS5815302A (en) | 1981-07-20 | 1981-07-20 | Antenna device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5815302A true JPS5815302A (en) | 1983-01-28 |
Family
ID=14624622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11392581A Pending JPS5815302A (en) | 1981-07-20 | 1981-07-20 | Antenna device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5815302A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5495259A (en) * | 1994-03-31 | 1996-02-27 | Lyasko; Gennady | Compact parametric antenna |
| GB2504213A (en) * | 2011-06-29 | 2014-01-22 | Roke Manor Research | Antenna circuit with magnetically coupled sets of sensing and feedback coils |
-
1981
- 1981-07-20 JP JP11392581A patent/JPS5815302A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5495259A (en) * | 1994-03-31 | 1996-02-27 | Lyasko; Gennady | Compact parametric antenna |
| GB2504213A (en) * | 2011-06-29 | 2014-01-22 | Roke Manor Research | Antenna circuit with magnetically coupled sets of sensing and feedback coils |
| GB2504213B (en) * | 2011-06-29 | 2014-05-07 | Roke Manor Research | Antenna circuit with magnetically coupled sets of sensing and feedback coils |
| US9234955B2 (en) | 2011-06-29 | 2016-01-12 | Roke Manor Research Limited | Reduced Q low frequency antenna |
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