JPH0618286B2 - TV antenna - Google Patents
TV antennaInfo
- Publication number
- JPH0618286B2 JPH0618286B2 JP59014053A JP1405384A JPH0618286B2 JP H0618286 B2 JPH0618286 B2 JP H0618286B2 JP 59014053 A JP59014053 A JP 59014053A JP 1405384 A JP1405384 A JP 1405384A JP H0618286 B2 JPH0618286 B2 JP H0618286B2
- Authority
- JP
- Japan
- Prior art keywords
- antenna
- television
- band
- antennas
- length
- 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 - Lifetime
Links
- 239000000758 substrate Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/18—Input circuits, e.g. for coupling to an antenna or a transmission line
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Support Of Aerials (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Description
【発明の詳細な説明】 〔技術分野〕 本発明はテレビ用アンテナ（以下アンテナ回路という）
に関する。TECHNICAL FIELD The present invention relates to a television antenna (hereinafter referred to as an antenna circuit).
Regarding
従来のテレビ用アンテナ回路、特に小型テレビに用いら
れるアンテナ回路は、第１図に示す如く、８０〜１２０
cmのロツドアンテナを用いるのが一般的であった。As shown in FIG. 1, a conventional antenna circuit for a television, particularly an antenna circuit used for a small television, has a range of 80 to 120.
It was common to use a rod antenna of cm.
この従来例は構成は簡単であるが、以下に列記する欠点
を有していた。This conventional example has a simple structure, but has the drawbacks listed below.
(a)ＶＨＦ低バンドを効率良く受信するには、テレビ放
送搬送波の波長と、アンテナ長の関係から最低８０cm程
度のアンテナ長が必要であり、アンテナ長を短かくする
と、ＶＨＦ低バンドでの利得低下が大きい。(a) To receive the VHF low band efficiently, an antenna length of at least about 80 cm is required due to the relationship between the wavelength of the television broadcast carrier and the antenna length. If the antenna length is shortened, the gain in the VHF low band will be increased. The drop is large.
波長をλ，アンテナ長をｌ、入力インピーダンスを７５
Ωとすると、ｌ＝（２ｎ−１）λ／４〔但しｎは正の整
数〕のとき利得最大となり、 ｌ＝２ｎλ／４〔但しｎは正の整数〕のとき利得最小と
なる。Wavelength is λ, antenna length is 1, input impedance is 75
If Ω, the gain becomes maximum when l = (2n−1) λ / 4 (where n is a positive integer), and the gain becomes minimum when l = 2nλ / 4 (where n is a positive integer).
各バンドの周波数と、利得最大となるアンテナ長は以下
の如くである。The frequency of each band and the antenna length that maximizes the gain are as follows.
ＶＨＦ低バンド ９０ＭＨｚ ８３cm １１０ＭＨｚ ６８cm ＶＨＦ高バンド １７０ＭＨｚ ４４cm ２２０ＭＨｚ ３４cm １０２cm ＵＨＦバンド ４７０ＭＨｚ １６cm ４８cm ８０cm ７７０ＭＨｚ １０cm ２９cm ４８cm ６８cm ８８cm (b)受信バンド、及び受信チヤンネルにより、アンテナ
長を調整しなければ、最大の入力が得られない。VHF low band 90MHz 83cm 110MHz 68cm VHF high band 170MHz 44cm 220MHz 34cm 102cm UHF band 470MHz 16cm 48cm 80cm 770MHz 10cm 29cm 48cm 68cm 88cm (b) If the antenna length is not adjusted by the receiving band and the receiving channel, the antenna length must be adjusted. I can't get it.
本発明はこの様な問題点解決するものであり、その目的
は、テレビ本体外に配置されるアンテナの全長を短かく
し、かつ受信バンドにより最適なアンテナ長で、最大の
入力を得るアンテナ回路を提供することである。The present invention solves such a problem, and an object thereof is to provide an antenna circuit which shortens the total length of an antenna arranged outside the main body of a television and obtains a maximum input with an optimum antenna length depending on a reception band. Is to provide.
本発明のテレビ用アンテナは、テレビ本体内の回路基板
上に形成されアンテナ入力端に接続された基板パターン
よりなる第１のアンテナと、前記テレビ本体内に配置さ
れるインダクタンス素子と、前記テレビ本体外部に配置
される第２のアンテナとを備え、ＵＨＦ受信時には前記
第１のアンテナにより受信し、ＶＨＦ高バンド受信時に
は互いに接続された前記第１及び第２のアンテナにより
受信し、ＶＨＦ低バンド受信時には前記第１及び第２の
アンテナと該第１及び第２のアンテナ間に接続された前
記インダクタンス素子とにより受信してなることを特徴
とする。The television antenna of the present invention includes a first antenna having a board pattern formed on a circuit board in the television body and connected to an antenna input end, an inductance element arranged in the television body, and the television body. A second antenna arranged externally, wherein the first antenna is used for reception of UHF, the first and second antennas connected to each other are used for reception of VHF high band, and VHF low band reception is performed. Sometimes, the reception is performed by the first and second antennas and the inductance element connected between the first and second antennas.
以下本発明について実施例に基づき詳細に説明する。 Hereinafter, the present invention will be described in detail based on examples.
第２図は本発明の一実施例を示す図であり、ＵＨＦ受信
時には、スイツチ(3)，(4)により、アンテナ(1)で受信
し、そのアンテナ長はＵＨＦ帯域の1/4波長に相当する
１０〜１６cm程度である。FIG. 2 is a diagram showing an embodiment of the present invention. At the time of receiving UHF, the antennas (1) are received by the switches (3) and (4), and the antenna length thereof is 1/4 wavelength of the UHF band. The corresponding length is about 10 to 16 cm.
ＶＨＦ高バンド受信時には、スイツチ(3)(4)により、ア
ンテナ(1)とアンテナ(2)が接続されて双方で受信し、ア
ンテナ(2)のアンテナ長は、ＶＨＦ高バンド帯域の1/4波
長からアンテナ(1)のアンテナ長を減じた２５〜３５cm
程度である。At the time of VHF high band reception, the switches (3) and (4) connect the antenna (1) and the antenna (2) and both receive, and the antenna length of the antenna (2) is 1/4 of the VHF high band. 25-35 cm obtained by subtracting the antenna length of the antenna (1) from the wavelength
It is a degree.
ＶＨＦ低バンド受信時には、スイツチ(3)(4)により、ア
ンテナ(1)(2)間にインダクタンス素子(5)が接続されて
三者で受信し、インダクタンス素子のインダクタンス値
は(1)(5)(2)の全体の等価アンテナ長が、６８〜８３cm
程度となる様に選択する。At the time of VHF low band reception, the inductance elements (5) are connected between the antennas (1) and (2) by the switches (3) and (4) for reception by the three parties, and the inductance value of the inductance elements is (1) (5 ) (2) overall equivalent antenna length is 68-83 cm
Select so that it becomes a degree.
第３図は本発明の別の実施例であり、スイツチ素子は一
組となっている。FIG. 3 shows another embodiment of the present invention, in which the switch elements are one set.
インダクタンス素子(5)の自己共振周波数はＶＨＦ高バ
ンドとＵＨＦの間にあり、自己共振周波数とＱ値の選び
方により、ＵＨＦ受信時には、インダクタンス素子(5)
のキヤパシタンスが、アンテナ(2)のインダクタンスを
ほぼ打ち消す様に設定し、更に簡単な構成で同等の効果
を有している。The self-resonant frequency of the inductance element (5) is between the high band of VHF and UHF. Depending on how the self-resonant frequency and the Q value are selected, the inductance element (5) can be received during UHF reception.
The capacitance is set so as to almost cancel the inductance of the antenna (2), and the same effect can be obtained with a simpler configuration.
また、第１のアンテナは１０〜１６cm程度のアンテナ長
であり、回路基板上でパターンで構成する実施例も考え
得る。Further, the first antenna has an antenna length of about 10 to 16 cm, and an embodiment in which the first antenna is formed in a pattern on the circuit board can be considered.
第４図は本発明のアンテナ回路のテレビにおける構成例
である。第４図ではテレビ本体内の回路基板（プリント
配線板ともいう）(6 )上に形成された基板パターン(1 )
により第１のアンテナが構成され、さらに基板(6 )には
インダクタンス素子(5 )とバンドスイッチ(3 )が配置さ
れる。第１のアンテナ(1 )はチューナ(7 )のアンテナ入
力端に接続される。テレビ本体外にはロッドアンテナ(2
)よりなる第２のアンテナが配置される。FIG. 4 shows a configuration example of the antenna circuit of the present invention in a television. In Fig. 4, the board pattern (1) formed on the circuit board (also called a printed wiring board) (6) inside the TV body
The first antenna is constituted by this, and the inductance element (5) and the band switch (3) are further arranged on the substrate (6). The first antenna (1) is connected to the antenna input end of the tuner (7). The rod antenna (2
) Is arranged.
本発明によれば、受信バンドによりアンテナ長を調整す
ることなく最大の入力を得る事が可能であり、合わせて
機器外部のアンテナ長が従来の1/2〜1/3となるので、小
型テレビ機器の操作性向上、デザイン及び設計の自由度
へ大きく寄与する。さらに、機器内部に配置されたアン
テナは回路基板上の基板パターンにより形成されるの
で、部品点数が増加することなく、低コストとすること
ができる。According to the present invention, it is possible to obtain the maximum input without adjusting the antenna length depending on the reception band, and the antenna length outside the device is 1/2 to 1/3 of the conventional one, so that a small television It greatly contributes to the improvement of the operability of the equipment and the freedom of design and design. Further, since the antenna arranged inside the device is formed by the board pattern on the circuit board, the cost can be reduced without increasing the number of parts.
第１図は従来のアンテナ回路を示す図。 (1)ロツドアンテナ 第２図は本発明の一実施例を示す図。 (1)……第１のロツドアンテナ (2)……第２のロツドアンテナ (3)……スイツチ素子 (4)……スイツチ素子 (5)……インダクタンス素子 第３図は本発明の別の実施例を示す図。 (1)……第１のロツドアンテナ (2)……第２のロツドアンテナ (3)……スイツチ素子 (5)……インダクタンス素子 第４図は本発明のテレビ用アンテナの構成例を示す図で
ある。 (1)……第１のアンテナ（基板パターン） (2)……第２のアンテナ（ロツドアンテナ） (3)……バンドスイツチ（２回路） (5)……インダクタンス素子 (6)……回路基板 (7)……チユーナFIG. 1 is a diagram showing a conventional antenna circuit. (1) Rod Antenna FIG. 2 is a diagram showing an embodiment of the present invention. (1) ...... First rod antenna (2) ...... Second rod antenna (3) ...... Switch element (4) ...... Switch element (5) ...... Inductance element FIG. 3 shows another embodiment of the present invention. FIG. (1) ...... First rod antenna (2) ...... Second rod antenna (3) ...... Switch element (5) ...... Inductance element Fig. 4 is a diagram showing a configuration example of the television antenna of the present invention. . (1) …… First antenna (board pattern) (2) …… Second antenna (rod antenna) (3) …… Band switch (2 circuits) (5) …… Inductance element (6) …… Circuit board (7) …… Chyuna
Claims (1)
テナ入力端に接続された基板パターンよりなる第１のア
ンテナと、前記テレビ本体内に配置されるインダクタン
ス素子と、前記テレビ本体外部に配置される第２のアン
テナとを備え、 ＵＨＦ受信時には前記第１のアンテナにより受信し、Ｖ
ＨＦ高バンド受信時には互いに接続された前記第１及び
第２のアンテナにより受信し、ＶＨＦ低バンド受信時に
は前記第１及び第２のアンテナと該第１及び第２のアン
テナ間に接続された前記インダクタンス素子とにより受
信してなる ことを特徴とするテレビ用アンテナ。1. A first antenna comprising a substrate pattern formed on a circuit board in a television main body and connected to an antenna input end, an inductance element arranged in the television main body, and arranged outside the television main body. And a second antenna that is used for receiving UHF,
The HF high band reception is performed by the first and second antennas connected to each other, and the VHF low band reception is performed by the first and second antennas and the inductance connected between the first and second antennas. A television antenna characterized by being received by an element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59014053A JPH0618286B2 (en) | 1984-01-28 | 1984-01-28 | TV antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59014053A JPH0618286B2 (en) | 1984-01-28 | 1984-01-28 | TV antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60158732A JPS60158732A (en) | 1985-08-20 |
| JPH0618286B2 true JPH0618286B2 (en) | 1994-03-09 |
Family
ID=11850341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59014053A Expired - Lifetime JPH0618286B2 (en) | 1984-01-28 | 1984-01-28 | TV antenna |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0618286B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63129308U (en) * | 1987-02-17 | 1988-08-24 | ||
| JP3597344B2 (en) * | 1997-07-30 | 2004-12-08 | アルプス電気株式会社 | Television signal receiving tuner and television signal receiving unit for personal computer |
| JP4337457B2 (en) * | 2003-07-30 | 2009-09-30 | 日本電気株式会社 | ANTENNA DEVICE AND RADIO COMMUNICATION DEVICE USING THE SAME |
| JP2008306441A (en) * | 2007-06-07 | 2008-12-18 | Dx Antenna Co Ltd | Multidirectional antenna, and multidirectional combination antenna |
| EP2962361A1 (en) * | 2013-03-01 | 2016-01-06 | UMC Utrecht Holding B.V. | Dipole antenna for a magnetic resonance imaging system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4925843A (en) * | 1972-06-20 | 1974-03-07 | ||
| JPS5029145A (en) * | 1973-07-17 | 1975-03-25 | ||
| JPS58148503A (en) * | 1982-02-26 | 1983-09-03 | Maspro Denkoh Corp | Reception antenna for television signal |
-
1984
- 1984-01-28 JP JP59014053A patent/JPH0618286B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60158732A (en) | 1985-08-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |