JPH07221536A - Small antenna - Google Patents
Small antennaInfo
- Publication number
- JPH07221536A JPH07221536A JP6035408A JP3540894A JPH07221536A JP H07221536 A JPH07221536 A JP H07221536A JP 6035408 A JP6035408 A JP 6035408A JP 3540894 A JP3540894 A JP 3540894A JP H07221536 A JPH07221536 A JP H07221536A
- Authority
- JP
- Japan
- Prior art keywords
- feeding
- plate
- radiating element
- small antenna
- radiation 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.)
- Pending
Links
Landscapes
- Waveguide Aerials (AREA)
- Transceivers (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、携帯無線機、コードレ
スフォン等の無線通信機に内蔵する小形アンテナに関
し、特に所望の共振周波数へのインピーダンス整合を行
うことが容易な小形アンテナに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small antenna incorporated in a wireless communication device such as a portable wireless device and a cordless phone, and more particularly to a small antenna which can easily perform impedance matching to a desired resonance frequency.
【０００２】[0002]
【従来の技術】従来、この種の小形アンテナは携帯無線
機に内蔵するアンテナとして図３に示すような板状逆Ｆ
型アンテナが知られている。このアンテナは、無線機筐
体をグランド板１として動作するもので、筐体（グラン
ド板）上に設置された板状の放射素子４と、この放射素
子４とグランド板１とを短絡する短絡板３と、放射素子
４に給電する給電線６に接続された給電ピン２によって
構成される。2. Description of the Related Art Conventionally, a small antenna of this type is a plate-shaped inverted F as shown in FIG.
Shaped antennas are known. This antenna operates with the radio housing as the ground plate 1, and has a plate-shaped radiating element 4 installed on the housing (ground plate) and a short circuit that short-circuits the radiating element 4 and the ground plate 1. It is composed of a plate 3 and a feed pin 2 connected to a feed line 6 for feeding the radiating element 4.
【０００３】このアンテナの共振周波数は基本的には放
射素子４の縦・横の長さによって決定されるが、さらに
小形化するためには、短絡板３の幅を短くしたり、放射
素子４に切り込みを入れたり、または放射素子先端部に
容量素子を装荷する等の方法がある。また、供電ピンを
短絡板と放射素子先端との間の適切な位置に設置するこ
とによりインピーダンス整合を行っている。The resonance frequency of this antenna is basically determined by the length and width of the radiating element 4, but in order to further reduce the size, the width of the short-circuit plate 3 is shortened or the radiating element 4 is used. There is a method such as making a notch or loading a capacitive element at the tip of the radiating element. Moreover, impedance matching is performed by installing a power supply pin at an appropriate position between the short-circuit plate and the tip of the radiating element.
【０００４】[0004]
【発明が解決しようとする課題】このように板状逆Ｆ型
アンテナは携帯無線機に内蔵可能なアンテナとして非常
に小形化することが出来るが、一方アンテナ周辺に配置
される電気回路素子の配置関係に影響を受け易く、携帯
無線機などでは、アンテナの周辺にある電気部品、回路
素子等の変更によって共振周波数、入力インピーダンス
等のアンテナ特性が大きく変化しがちであるので、その
都度放射素子の切り込み部分を変更したり、供電ピンの
位置を変更したりしなければならないという不都合があ
った。本発明は、上記従来技術の問題点を解決するよう
にした小形アンテナを提供することを目的とする。As described above, the plate-shaped inverted F-type antenna can be extremely miniaturized as an antenna that can be built in a portable radio device, but on the other hand, the arrangement of electric circuit elements arranged around the antenna. It is easy to be affected by the relationship, and in portable wireless devices, etc., antenna characteristics such as resonance frequency and input impedance tend to change greatly due to changes in electrical parts and circuit elements around the antenna. There is an inconvenience that it is necessary to change the cut portion and the position of the power supply pin. It is an object of the present invention to provide a small antenna that solves the above-mentioned problems of the conventional art.
【０００５】[0005]
【課題を解決するための手段】本発明は、このような従
来技術の問題点を解決するために、誘電体あるいは空気
層を挟んで互いに対向配置した放射素子及びグランド板
と、該放射素子と該グランド板とを短絡する短絡板と、
該放射素子に給電する給電ピンとから構成される小形ア
ンテナにおいて、該給電ピンに接続された給電用平板
が、該放射素子と間隙をおいて平行に配置される構成と
することにより、所望の共振周波数でインピーダンス整
合が得られる構成とする。In order to solve the problems of the prior art, the present invention provides a radiating element and a ground plate which are arranged to face each other with a dielectric or air layer interposed therebetween, and the radiating element. A short-circuit plate that short-circuits the ground plate,
In a small antenna composed of a feed pin for feeding the radiating element, a feeding flat plate connected to the feeding pin is arranged in parallel with the radiating element with a gap so that a desired resonance is achieved. Impedance matching is obtained at the frequency.
【０００６】[0006]
【作用】本発明によれば、放射素子の先端部分の間隙を
おいて平行に配置した給電用平板を利用して容量給電す
る構成としたので、この小形アンテナは並列共振回路で
モデル化され得る。放射素子の先端無分は非常に入力抵
抗が大きいため、その先端部において容量素子を介して
給電することによりインピーダンス整合を容易に行うこ
とができる。また、更にグランド板に接続された平板を
放射素子とほぼ平行に配置することにより、該並列共振
回路における容量装荷が達成され、その平板とグランド
板の距離を調整することによって共振周波数を変化させ
ることができる。According to the present invention, the small antenna is modeled as a parallel resonance circuit because the feeding plates arranged in parallel with the gap between the tips of the radiating elements are used for capacitive feeding. . Since the tip end of the radiating element has a very large input resistance, impedance matching can be easily performed by feeding power through the capacitive element at the tip end portion. Further, by placing a flat plate connected to the ground plate substantially parallel to the radiating element, capacitive loading is achieved in the parallel resonant circuit, and the resonance frequency is changed by adjusting the distance between the flat plate and the ground plate. be able to.
【０００７】[0007]
【実施例】以下、本発明の一実施例につき図１、図２を
参照して詳細に述べる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to FIGS.
【０００８】図１、図２において、図３で述べた従来例
と同一若しくは同等の部材については、同一の参照符号
を用いてその詳細な説明を省略する。図１（ａ）及び
（ｂ）から明らかなように、グランド板１とほぼ平行に
配置された放射素子４は、その一端辺において短絡板３
によりグランド板１と短絡される。In FIGS. 1 and 2, members which are the same as or equivalent to those of the conventional example described in FIG. 3 are designated by the same reference numerals, and detailed description thereof is omitted. As is clear from FIGS. 1A and 1B, the radiating element 4 arranged substantially parallel to the ground plate 1 has the short-circuit plate 3 at one end side thereof.
Is short-circuited with the ground plate 1.
【０００９】放射素子４の他端部、即ち放射素子の先端
部には、給電線６の給電ピン２に接続された給電用平行
平板８が放射素子４とほぼ平行に配置されることにより
容量給電が達成される。この放射素子４とグランド板１
との間には空気以外の誘電体を挿入しても良い。インピ
ーダンス整合は、給電用平行平板８の面積あるいは平板
間距離を調整し、その容量を変えることによって行うこ
とができる。At the other end of the radiating element 4, that is, at the tip of the radiating element, a parallel plate 8 for feeding, which is connected to the feeding pin 2 of the feeding line 6, is arranged substantially parallel to the radiating element 4. Power supply is achieved. This radiating element 4 and ground plate 1
A dielectric other than air may be inserted between and. Impedance matching can be performed by adjusting the area or the distance between the flat plates 8 for feeding and changing the capacitance thereof.
【００１０】図２は、本発明の別実施例を示す斜視図で
あり、図１の実施例と相違するのは容量装荷用平行平板
７が追加設置されている点である。FIG. 2 is a perspective view showing another embodiment of the present invention. What differs from the embodiment of FIG. 1 is that a parallel plate 7 for capacity loading is additionally installed.
【００１１】即ち、この容量装荷用平行平板７はグラン
ド板１に接続されており、かつ放射素子４に対してほぼ
平行に配置されている。この平行平板７の面積を調整す
ることによって、所望の共振周波数にインピーダンス整
合することが容易に可能となる。That is, the parallel plate 7 for capacitive loading is connected to the ground plate 1 and is arranged substantially parallel to the radiating element 4. By adjusting the area of the parallel plate 7, impedance matching to a desired resonance frequency can be easily performed.
【００１２】即ち、この小形アンテナを設置する周辺部
の変化、例えば回路素子の配置上の変化があると、アン
テナの共振周波数や入力インピーダンス等アンテナ特性
において変化を生じるが、そのアンテナ特性の変化に対
応して、このアンテナの共振周波数を所望の値にインピ
ーダンス整合することが容易に可能となる。That is, when there is a change in the peripheral portion where this small antenna is installed, for example, a change in the arrangement of circuit elements, changes occur in the antenna characteristics such as the resonance frequency and input impedance of the antenna. Correspondingly, it becomes possible to easily impedance match the resonance frequency of this antenna to a desired value.
【００１３】[0013]
【発明の効果】以上述べたように、本発明によれば、平
行平板又はコンデンサー等の容量素子を利用することに
より、アンテナ給電が放射素子の先端部において行われ
るので、インピーダンス整合が容易に達成され得る。ま
た、グランド板と放射素子先端部との間においても同様
に容量素子を装荷することにより容易に所望の周波数で
共振させることが出来、携帯用無線機用小形アンテナと
して有効である。従って、従来例に見られるように給電
ピンを移動する等の繁雑なインピーダンス整合操作が不
用となる。As described above, according to the present invention, the antenna element is fed at the tip of the radiating element by using a capacitive element such as a parallel plate or a capacitor, so that impedance matching can be easily achieved. Can be done. Also, by similarly loading a capacitive element between the ground plate and the tip of the radiating element, it is possible to easily resonate at a desired frequency, which is effective as a small antenna for a portable wireless device. Therefore, the complicated impedance matching operation such as moving the feeding pin as in the conventional example is unnecessary.
【図１】図１（ａ）及び（ｂ）は本発明の一実施例を示
す斜視図及び側面図である。1A and 1B are a perspective view and a side view showing an embodiment of the present invention.
【図２】図２は、本発明の別実施例を示す斜視図であ
る。FIG. 2 is a perspective view showing another embodiment of the present invention.
【図３】図３は、従来の小形アンテナを示す斜視図であ
る。FIG. 3 is a perspective view showing a conventional small antenna.
１ グランド板 ２ 給電ピン ３ 短絡板 ４ 放射素子 ５ 放射素子先端部 ６ 給電線 ７ 容量装荷用平行平板 ８ 給電用平行平板 1 ground plate 2 feeding pin 3 short-circuit plate 4 radiating element 5 radiating element tip 6 feeding line 7 parallel plate for capacitive loading 8 parallel plate for feeding
Claims (1)
向配置した放射素子及びグランド板と、該放射素子と該
グランド板とを短絡する短絡板と、該放射素子に給電す
る給電ピンとから構成される小形アンテナにおいて、前
記放射素子の先端部分より容量素子を介して容量給電す
る手段を備えることを特徴とする小形アンテナ。1. A radiating element and a ground plate, which are arranged to face each other with a dielectric or an air layer in between, a short-circuit plate that short-circuits the radiating element and the ground plate, and a feeding pin that feeds power to the radiating element. The small antenna according to claim 1, further comprising means for capacitively feeding power from a tip portion of the radiating element via a capacitive element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6035408A JPH07221536A (en) | 1994-02-08 | 1994-02-08 | Small antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6035408A JPH07221536A (en) | 1994-02-08 | 1994-02-08 | Small antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07221536A true JPH07221536A (en) | 1995-08-18 |
Family
ID=12441069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6035408A Pending JPH07221536A (en) | 1994-02-08 | 1994-02-08 | Small antenna |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07221536A (en) |
Cited By (35)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08237019A (en) * | 1995-02-24 | 1996-09-13 | Nippondenso Co Ltd | On-vehicle antenna system |
| JPH1041736A (en) * | 1996-07-26 | 1998-02-13 | Saitama Nippon Denki Kk | Planar antenna |
| JPH10256825A (en) * | 1997-03-07 | 1998-09-25 | Murata Mfg Co Ltd | Resonance frequency adjustment method for surface mount antenna and impedance adjustment method |
| JP2002185241A (en) * | 2000-10-09 | 2002-06-28 | Koninkl Philips Electronics Nv | Patch antenna for microwave range |
| JP2003060425A (en) * | 2001-08-13 | 2003-02-28 | Sony Corp | Low-attitude small-sized antenna and structuring method therefor |
| KR20030089825A (en) * | 2002-05-20 | 2003-11-28 | 전자부품연구원 | Broadband antenna |
| WO2005109569A1 (en) * | 2004-05-12 | 2005-11-17 | Yokowo Co., Ltd. | Multi-band antenna, circuit substrate, and communication device |
| JP2006074812A (en) * | 2003-02-06 | 2006-03-16 | Matsushita Electric Ind Co Ltd | Portable radio communication apparatus |
| JP2009077238A (en) * | 2007-09-21 | 2009-04-09 | Toshiba Corp | Antenna device |
| JP2009290624A (en) * | 2008-05-30 | 2009-12-10 | Toshiba Corp | Antenna device |
| JP2010251697A (en) * | 2009-03-27 | 2010-11-04 | Toshiba Corp | Core-shell magnetic material, method of manufacturing the core-shell magnetic material, device element, and antenna device |
| US8866689B2 (en) | 2011-07-07 | 2014-10-21 | Pulse Finland Oy | Multi-band antenna and methods for long term evolution wireless system |
| US8988296B2 (en) | 2012-04-04 | 2015-03-24 | Pulse Finland Oy | Compact polarized antenna and methods |
| US9123990B2 (en) | 2011-10-07 | 2015-09-01 | Pulse Finland Oy | Multi-feed antenna apparatus and methods |
| US9203154B2 (en) | 2011-01-25 | 2015-12-01 | Pulse Finland Oy | Multi-resonance antenna, antenna module, radio device and methods |
| US9246210B2 (en) | 2010-02-18 | 2016-01-26 | Pulse Finland Oy | Antenna with cover radiator and methods |
| US9350081B2 (en) | 2014-01-14 | 2016-05-24 | Pulse Finland Oy | Switchable multi-radiator high band antenna apparatus |
| US9406998B2 (en) | 2010-04-21 | 2016-08-02 | Pulse Finland Oy | Distributed multiband antenna and methods |
| US9461371B2 (en) | 2009-11-27 | 2016-10-04 | Pulse Finland Oy | MIMO antenna and methods |
| US9484619B2 (en) | 2011-12-21 | 2016-11-01 | Pulse Finland Oy | Switchable diversity antenna apparatus and methods |
| US9531058B2 (en) | 2011-12-20 | 2016-12-27 | Pulse Finland Oy | Loosely-coupled radio antenna apparatus and methods |
| US9590308B2 (en) | 2013-12-03 | 2017-03-07 | Pulse Electronics, Inc. | Reduced surface area antenna apparatus and mobile communications devices incorporating the same |
| US9634383B2 (en) | 2013-06-26 | 2017-04-25 | Pulse Finland Oy | Galvanically separated non-interacting antenna sector apparatus and methods |
| US9647338B2 (en) | 2013-03-11 | 2017-05-09 | Pulse Finland Oy | Coupled antenna structure and methods |
| US9673507B2 (en) | 2011-02-11 | 2017-06-06 | Pulse Finland Oy | Chassis-excited antenna apparatus and methods |
| US9680212B2 (en) | 2013-11-20 | 2017-06-13 | Pulse Finland Oy | Capacitive grounding methods and apparatus for mobile devices |
| US9722308B2 (en) | 2014-08-28 | 2017-08-01 | Pulse Finland Oy | Low passive intermodulation distributed antenna system for multiple-input multiple-output systems and methods of use |
| US9761951B2 (en) | 2009-11-03 | 2017-09-12 | Pulse Finland Oy | Adjustable antenna apparatus and methods |
| US9906260B2 (en) | 2015-07-30 | 2018-02-27 | Pulse Finland Oy | Sensor-based closed loop antenna swapping apparatus and methods |
| US9917346B2 (en) | 2011-02-11 | 2018-03-13 | Pulse Finland Oy | Chassis-excited antenna apparatus and methods |
| US9948002B2 (en) | 2014-08-26 | 2018-04-17 | Pulse Finland Oy | Antenna apparatus with an integrated proximity sensor and methods |
| US9973228B2 (en) | 2014-08-26 | 2018-05-15 | Pulse Finland Oy | Antenna apparatus with an integrated proximity sensor and methods |
| US9979078B2 (en) | 2012-10-25 | 2018-05-22 | Pulse Finland Oy | Modular cell antenna apparatus and methods |
| US10069209B2 (en) | 2012-11-06 | 2018-09-04 | Pulse Finland Oy | Capacitively coupled antenna apparatus and methods |
| US10079428B2 (en) | 2013-03-11 | 2018-09-18 | Pulse Finland Oy | Coupled antenna structure and methods |
-
1994
- 1994-02-08 JP JP6035408A patent/JPH07221536A/en active Pending
Cited By (37)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08237019A (en) * | 1995-02-24 | 1996-09-13 | Nippondenso Co Ltd | On-vehicle antenna system |
| JPH1041736A (en) * | 1996-07-26 | 1998-02-13 | Saitama Nippon Denki Kk | Planar antenna |
| JPH10256825A (en) * | 1997-03-07 | 1998-09-25 | Murata Mfg Co Ltd | Resonance frequency adjustment method for surface mount antenna and impedance adjustment method |
| JP2002185241A (en) * | 2000-10-09 | 2002-06-28 | Koninkl Philips Electronics Nv | Patch antenna for microwave range |
| JP2003060425A (en) * | 2001-08-13 | 2003-02-28 | Sony Corp | Low-attitude small-sized antenna and structuring method therefor |
| KR20030089825A (en) * | 2002-05-20 | 2003-11-28 | 전자부품연구원 | Broadband antenna |
| JP2006074812A (en) * | 2003-02-06 | 2006-03-16 | Matsushita Electric Ind Co Ltd | Portable radio communication apparatus |
| WO2005109569A1 (en) * | 2004-05-12 | 2005-11-17 | Yokowo Co., Ltd. | Multi-band antenna, circuit substrate, and communication device |
| JP2009077238A (en) * | 2007-09-21 | 2009-04-09 | Toshiba Corp | Antenna device |
| JP2009290624A (en) * | 2008-05-30 | 2009-12-10 | Toshiba Corp | Antenna device |
| US8508423B2 (en) | 2008-05-30 | 2013-08-13 | Kabushiki Kaisha Toshiba | Antenna device |
| JP2010251697A (en) * | 2009-03-27 | 2010-11-04 | Toshiba Corp | Core-shell magnetic material, method of manufacturing the core-shell magnetic material, device element, and antenna device |
| US9761951B2 (en) | 2009-11-03 | 2017-09-12 | Pulse Finland Oy | Adjustable antenna apparatus and methods |
| US9461371B2 (en) | 2009-11-27 | 2016-10-04 | Pulse Finland Oy | MIMO antenna and methods |
| US9246210B2 (en) | 2010-02-18 | 2016-01-26 | Pulse Finland Oy | Antenna with cover radiator and methods |
| US9406998B2 (en) | 2010-04-21 | 2016-08-02 | Pulse Finland Oy | Distributed multiband antenna and methods |
| US9203154B2 (en) | 2011-01-25 | 2015-12-01 | Pulse Finland Oy | Multi-resonance antenna, antenna module, radio device and methods |
| US9917346B2 (en) | 2011-02-11 | 2018-03-13 | Pulse Finland Oy | Chassis-excited antenna apparatus and methods |
| US9673507B2 (en) | 2011-02-11 | 2017-06-06 | Pulse Finland Oy | Chassis-excited antenna apparatus and methods |
| US8866689B2 (en) | 2011-07-07 | 2014-10-21 | Pulse Finland Oy | Multi-band antenna and methods for long term evolution wireless system |
| US9123990B2 (en) | 2011-10-07 | 2015-09-01 | Pulse Finland Oy | Multi-feed antenna apparatus and methods |
| US9531058B2 (en) | 2011-12-20 | 2016-12-27 | Pulse Finland Oy | Loosely-coupled radio antenna apparatus and methods |
| US9484619B2 (en) | 2011-12-21 | 2016-11-01 | Pulse Finland Oy | Switchable diversity antenna apparatus and methods |
| US8988296B2 (en) | 2012-04-04 | 2015-03-24 | Pulse Finland Oy | Compact polarized antenna and methods |
| US9509054B2 (en) | 2012-04-04 | 2016-11-29 | Pulse Finland Oy | Compact polarized antenna and methods |
| US9979078B2 (en) | 2012-10-25 | 2018-05-22 | Pulse Finland Oy | Modular cell antenna apparatus and methods |
| US10069209B2 (en) | 2012-11-06 | 2018-09-04 | Pulse Finland Oy | Capacitively coupled antenna apparatus and methods |
| US10079428B2 (en) | 2013-03-11 | 2018-09-18 | Pulse Finland Oy | Coupled antenna structure and methods |
| US9647338B2 (en) | 2013-03-11 | 2017-05-09 | Pulse Finland Oy | Coupled antenna structure and methods |
| US9634383B2 (en) | 2013-06-26 | 2017-04-25 | Pulse Finland Oy | Galvanically separated non-interacting antenna sector apparatus and methods |
| US9680212B2 (en) | 2013-11-20 | 2017-06-13 | Pulse Finland Oy | Capacitive grounding methods and apparatus for mobile devices |
| US9590308B2 (en) | 2013-12-03 | 2017-03-07 | Pulse Electronics, Inc. | Reduced surface area antenna apparatus and mobile communications devices incorporating the same |
| US9350081B2 (en) | 2014-01-14 | 2016-05-24 | Pulse Finland Oy | Switchable multi-radiator high band antenna apparatus |
| US9948002B2 (en) | 2014-08-26 | 2018-04-17 | Pulse Finland Oy | Antenna apparatus with an integrated proximity sensor and methods |
| US9973228B2 (en) | 2014-08-26 | 2018-05-15 | Pulse Finland Oy | Antenna apparatus with an integrated proximity sensor and methods |
| US9722308B2 (en) | 2014-08-28 | 2017-08-01 | Pulse Finland Oy | Low passive intermodulation distributed antenna system for multiple-input multiple-output systems and methods of use |
| US9906260B2 (en) | 2015-07-30 | 2018-02-27 | Pulse Finland Oy | Sensor-based closed loop antenna swapping apparatus and methods |
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