JPS60158732A - Antenna circuit for television - Google Patents

Antenna circuit for television

Info

Publication number
JPS60158732A
JPS60158732A JP59014053A JP1405384A JPS60158732A JP S60158732 A JPS60158732 A JP S60158732A JP 59014053 A JP59014053 A JP 59014053A JP 1405384 A JP1405384 A JP 1405384A JP S60158732 A JPS60158732 A JP S60158732A
Authority
JP
Japan
Prior art keywords
antenna
band
length
switch
inductance element
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.)
Granted
Application number
JP59014053A
Other languages
Japanese (ja)
Other versions
JPH0618286B2 (en
Inventor
Masayuki Suzuki
正幸 鈴木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seiko Epson Corp
Suwa Seikosha KK
Original Assignee
Seiko Epson Corp
Suwa Seikosha KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Seiko Epson Corp, Suwa Seikosha KK filed Critical Seiko Epson Corp
Priority to JP59014053A priority Critical patent/JPH0618286B2/en
Publication of JPS60158732A publication Critical patent/JPS60158732A/en
Publication of JPH0618286B2 publication Critical patent/JPH0618286B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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)

Abstract

PURPOSE:To reduce the total length of an antenna down to the value corresponding to a receiving band by using the 1st antenna connected to an input terminal, the 2nd antenna set via two pairs of switch elements working in response to a band switch, and an inductance element. CONSTITUTION:In a UHF reception mode the signals are received by an antenna 1 via switches 3 and 4. In this case, the antenna length is set at about 10- 16cm corresponding to 1/4 wavelength of a UHF band. In a reception mode of a VHF high band, the antenna 1 is connected to an antenna 2 by switches 3 and 4 for reception of signals. The length of the antenna 2 is set at about 25-35cm obtained by subtracting the length of the antenna 1 from 1/4 wavelength of the VHF high band. In a reception mode of VHF low band, an inductance element 5 is connected between antennas 1 and 2 by the switches 3 and 4. The total equivalent antenna length is set at about 68-83cm. Thus it is possible to obtain an antenna which can obtain the maximum input in response to the receiving band with reduction of the total length of the antenna.

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回路に関する。[Detailed description of the invention] 〔Technical field〕 The present invention relates to a television antenna circuit.

〔従来技術〕[Prior art]

従来のテレビ用アンテナ回路、特に小型テレビに用すら
れるアンテナ回路は、第１図に示す如く、８０〜１２０
（１）のロッドアンテナを用いるのが一般的であった。Conventional television antenna circuits, especially antenna circuits used for small televisions, have a frequency of 80 to 120, as shown in FIG.
It was common to use the rod antenna (1).

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。Although this conventional example has a simple configuration, it has the following drawbacks.

に）ＶＨＦ低バンドを効率良く受信するにｈ１テレビ放
送搬送波の波長と、アンテナ長の関係から最低８０副程
度のアンテナ長が必要でおル、アンテナ回路回 低下が大きい。2) To efficiently receive the VHF low band, an antenna length of at least 80 subbands is required due to the relationship between the wavelength of the H1 television broadcast carrier wave and the antenna length, which results in a significant reduction in antenna circuit times.

波長をλ、アンテナ長を！、入力インピーダンスを７５
０とすると、Ｊｌ＝Ｃ２ｎ−１）λ／４〔但しｎは正の
整数〕のとき利得最大となシ、！＝２ｎλ／４〔但しｎ
は正の整数〕のとき利得最小となる。The wavelength is λ, the antenna length is! , the input impedance is 75
0, the gain is maximum when Jl=C2n-1)λ/4 [where n is a positive integer]! =2nλ/4 [however, n
is a positive integer], the gain is minimum.

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 at which the gain is maximum are as follows.

ＶＨＦ低バンド　９’ＯＭＨｚ　８８ｃｆｎ１．１０Ｍ
Ｈｚ　６８ｃｒｎ ＶＨＦ高バンド　１７０ＭＨｇ　４４ｔ１ｎ２２０ＭＨ
ｚ　８４ｃｒｎ １０２ｃＩＴＩ ＵＨＦバンド　４７０ＭＨ２１６ｍ’ ８ＣＩｎ ０ｃｒｎ ７７０ＭＨｇ　１０ｔＭ ９ｔｙｎ ８ｃｒｎ 　８　ｏｎ ８ｍ （ｂ）受信バンド、及び受信チャンネルにより、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 9'OMHz 88cfn1.10M
Hz 68crn VHF high band 170MHg 44t1n220MH
z 84crn 102cITI UHF band 470MH216m' 8CIn 0crn 770MHg 10tM 9tyn 8crn 8 on 8m (b) Maximum input cannot be obtained unless the antenna length is adjusted depending on the reception band and reception channel.

〔目的〕〔the purpose〕

本発明はこの様な問題点を解決するもので６３）、その
目的は、全長を短かくシ、かつ受信バンドによシ最適な
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 is intended to solve these problems63), and its purpose is to provide an antenna circuit that has a short overall length, has an optimal antenna length for the receiving band, and can obtain maximum input. be.

〔概要〕〔overview〕

本発明のアンテナ回路は、入力端に接続された鼾　＋Ｚ
）７ｙテナと、バンドスイッチに連動したスイッチ素子
を介した第２のアンテナと、インダクタンス素子とから
成り、上記スイッチ素子によシ、ＵＨＦ受信時には第１
のアンテナのみで受信し、ＶＨＦ高バンド受信時には第
１及び第２のアンテナで受信し、ＶＨＩＦ低バンド受信
時には第１及び第２のアンテナ、及び第１．第２のアン
テナ間ニ接続されたインダクタンス素子で受信する事を
特徴とする。The antenna circuit of the present invention has an antenna connected to the input terminal.
)7y antenna, a second antenna via a switch element linked to a band switch, and an inductance element.
When receiving the VHF high band, the signal is received by the first and second antennas, and when receiving the VHIF low band, the signal is received by the first and second antennas, and the first antenna. It is characterized in that reception is performed by an inductance element connected between the second antennas.

〔実施例〕〔Example〕

以下本発明について実施例に基づき詳細に説明する。 The present invention will be described in detail below based on examples.

第２図は本発明の一実施例を示す図であｊ５、ＵＨＦ受
信時には、スイッチ（８）　、　（４）により、アンテ
ナ（１）で受信し、そのアンテナ長はＵＨＦ帯域の猛波
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. When receiving UHF, switches (8) and (4) are used to receive the antenna (1), and the length of the antenna corresponds to the extreme wavelength of the UHF band. It is about 10 to 16 cm.

ＶＨＦ高バンド受信時には、スイッチ（８）　（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、アンテナ伐）のアンテナ長は、ＶＨＦ高バ
ンド帯域の鷲波長からアンテナ（１）のアンテナ長を減
じた２５〜８５ａ＋＋程度である。When receiving VHF high band, switch (8) (4) connects antenna (1) and antenna (2) so that both antennas can receive data. It is approximately 25 to 85a++, which is the antenna length of (1) reduced.

ｖＨＩ＋′低バンド受信時には、スイッチ（ａ）、（４
）により、アンテナＣＩ）　（２）間にインダクタンス
素子（５）が接続されて王者で受信し、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、６８〜８８６ｎ程度となる様に
選択する。When receiving vHI+' low band, switch (a), (4
), an inductance element (5) is connected between the antenna CI) (2), and reception is performed by the king, and the inductance value of the inductance element is (1), (5), and the overall equivalent antenna length of (2) is 68~ It is selected to be approximately 886n.

第８図は本発明の別の実施例であル、スイッチ素子は一
組となっている。FIG. 8 shows another embodiment of the present invention, in which the switching elements are one set.

インダクタンス素子（５）の自己共振周波数はＷＨＩＰ
高バンドとＵＨＩＰの間にあル、自己共振周波数とＱ値
の選び方によｐ、ＵＨＩＦ受信時には、インダクタンス
素子（５）のキャパシタンスが、アンテナＣ２）のイン
ダクタンスをは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-resonance frequency of the inductance element (5) is WHIP
Depending on how the self-resonant frequency and Q value are selected between the high band and UHIP, when receiving UHIF, the capacitance of the inductance element (5) is set so as to cancel out the inductance of the antenna C2), and It has a simple configuration and the same effect.

また、第１のアンテナは１０〜１６ｃｒｎ程度のアンテ
ナ長であル、回路基板上でパターンで構成する実施例も
考え得る。Further, an embodiment in which the first antenna has an antenna length of about 10 to 16 crn and is configured as a pattern on a circuit board is also conceivable.

第４図は具体的な商品への応用例である。Figure 4 shows an example of application to a specific product.

〔効果〕〔effect〕

本発明によれば、受信バンドによシ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
機器外部のロンドアンテナ長が従来のＷ−晃となるので
、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。According to the present invention, it is possible to obtain the maximum input without adjusting the antenna length depending on the receiving band, and the length of the external Rondo antenna becomes the conventional W-Akira, making it possible to obtain small TV equipment. This greatly contributes to improved operability and design freedom.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は従来のアンテナ回路を示す図。 （１）ロンドアンテナ 第２ｍは本発明の一実施例を示す図。 （１）第１のロッドアンテナ Ｑ）第２のロンドアンテナ （８）スイッチ素子 （→スイッチ素子 （５）インダクタンス素子 第８図は本発明の別の実施例を示す図。 （１）第１のロンドアンテナ （２）第２のロンドアンテナ （８）スイッチ素子 （５）インダクタンス素子 第４図は本発明の応用例を示す図である。 （１）第１のアンテナ（基板パターン）（２）！Ｅ２の
アンテナ（ロンドアンテナ）（８）バンドスイッチ（２
回路） （５）インダクタンス素子 （６）回路基板 （７）チューナ 以　上 出願人　株式会社諏訪精工舎 第１図 、第２図 第３図 第４図FIG. 1 is a diagram showing a conventional antenna circuit. (1) Rondo antenna No. 2m is a diagram showing an embodiment of the present invention. (1) First rod antenna Q) Second Rondo antenna (8) Switch element (→ switch element (5) Inductance element FIG. 8 is a diagram showing another embodiment of the present invention. Rondo antenna (2) Second Rondo antenna (8) Switch element (5) Inductance element Figure 4 is a diagram showing an application example of the present invention. (1) First antenna (substrate pattern) (2)! E2 antenna (Rondo antenna) (8) Band switch (2)
Circuit) (5) Inductance element (6) Circuit board (7) Tuner and above Applicant Suwa Seikosha Co., Ltd. Figure 1, Figure 2, Figure 3, Figure 4

Claims (2)

【特許請求の範囲】[Claims] （１）入力端に接続された第１のアンテナと、バンドス
イッチに連動した２組のスイッチ素子を介した第２のア
ンテナと、インダクタンス素子とから成９、上記スイッ
チ素子によＪ、ＵＨＦ受信時には第１のアンテナのみで
受信し、ｖＨＦ高バンド受信時には、第１及び第２のア
ンテナで受信し、ＶＨＦ低バンド受信時ＪＣｉｉ：、第
１及び第２のアンテナ、及び第１．棺２のアンテナ間に
接続されたインダクタンス素子で受信することを特徴と
するテレビ用アンテナ回路。(1) Consisting of a first antenna connected to the input end, a second antenna via two sets of switch elements linked to a band switch, and an inductance element, J, UHF reception is performed by the switch element. Sometimes the signal is received by only the first antenna, when receiving VHF high band, it is received by the first and second antennas, and when receiving VHF low band, it is received by JCii:, the first and second antennas, and the first . A television antenna circuit characterized in that reception is performed by an inductance element connected between antennas of a coffin 2. （２）入力端に接続された第１のアンテナと、バンドス
イッチに連動したスイッチ素子を介した第２のアンテナ
と、インダクタンス素子とから成る特許請求の範囲第１
項記載のテレビ用アンテナ回路。 ω）第１のアンテナをプリント配線板上に形成し″たこ
とを特徴とする特許請求の範囲第１項及び第２項記載の
テレビ用アンテナ回路。(2) Claim 1 consisting of a first antenna connected to an input end, a second antenna via a switch element linked to a band switch, and an inductance element.
TV antenna circuit described in Section 1. ω) The television antenna circuit according to claims 1 and 2, characterized in that the first antenna is formed on a printed wiring board.
JP59014053A 1984-01-28 1984-01-28 TV antenna Expired - Lifetime JPH0618286B2 (en)

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 true JPS60158732A (en) 1985-08-20
JPH0618286B2 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)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63129308U (en) * 1987-02-17 1988-08-24
JP2005051572A (en) * 2003-07-30 2005-02-24 Nec Corp Antenna assembly and radio communication device using the same
DE19833780B4 (en) * 1997-07-30 2007-02-08 Alps Electric Co., Ltd. Television signal receiving tuner and television signal receiving unit for a personal computer
JP2008306441A (en) * 2007-06-07 2008-12-18 Dx Antenna Co Ltd Multidirectional antenna, and multidirectional combination antenna
WO2014133391A1 (en) * 2013-03-01 2014-09-04 Umc Utrecht Holding B.V. Dipole antenna for a magnetic resonance imaging system

Citations (3)

* Cited by examiner, † Cited by third party
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
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

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63129308U (en) * 1987-02-17 1988-08-24
DE19833780B4 (en) * 1997-07-30 2007-02-08 Alps Electric Co., Ltd. Television signal receiving tuner and television signal receiving unit for a personal computer
JP2005051572A (en) * 2003-07-30 2005-02-24 Nec Corp Antenna assembly 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
WO2014133391A1 (en) * 2013-03-01 2014-09-04 Umc Utrecht Holding B.V. Dipole antenna for a magnetic resonance imaging system

Also Published As

Publication number Publication date
JPH0618286B2 (en) 1994-03-09

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