JPH0344443B2 - - Google Patents
Info
- Publication number
- JPH0344443B2 JPH0344443B2 JP58165264A JP16526483A JPH0344443B2 JP H0344443 B2 JPH0344443 B2 JP H0344443B2 JP 58165264 A JP58165264 A JP 58165264A JP 16526483 A JP16526483 A JP 16526483A JP H0344443 B2 JPH0344443 B2 JP H0344443B2
- Authority
- JP
- Japan
- Prior art keywords
- plate
- conductor plate
- radiation conductor
- antenna
- shaped radiation
- 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
- 239000004020 conductor Substances 0.000 claims description 76
- 230000005855 radiation Effects 0.000 claims description 40
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010295 mobile communication Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
- H01Q9/0414—Substantially flat resonant element parallel to ground plane, e.g. patch antenna in a stacked or folded configuration
Landscapes
- Waveguide Aerials (AREA)
Description
【発明の詳細な説明】 発明の属する技術分野 本発明は、逆Ｆアンテナの構造に関する。[Detailed description of the invention] Technical field to which the invention belongs The present invention relates to the structure of an inverted F antenna.
従来技術
従来の逆Ｆアンテナは、第１図に示すように構
成されている。すなわち、接地導体板５に対向さ
せてに板状放射導体板１０を配置し、板状放射導
体板１０と接地導体板５とを短絡ピン６によつて
短絡し、同軸ケーブル８によつて板状放射導体板
１０に高周波電力を給電する。誘電体ブロツク９
は板状放射導体板１０を接地導体板５に所定間隔
ｈで支持するための部材である。上述の逆Ｆアン
テナは、小形低姿勢に構成される利点があり、広
く使用されている。Prior Art A conventional inverted F antenna is configured as shown in FIG. That is, the plate-shaped radiation conductor plate 10 is arranged opposite to the ground conductor plate 5, the plate-shaped radiation conductor plate 10 and the ground conductor plate 5 are short-circuited by the shorting pin 6, and the plate-shaped radiation conductor plate 10 and the ground conductor plate 5 are short-circuited by the shorting pin 6. High frequency power is supplied to the shaped radiating conductor plate 10. Dielectric block 9
is a member for supporting the plate-shaped radiation conductor plate 10 on the ground conductor plate 5 at a predetermined interval h. The above-described inverted F antenna has the advantage of being small and has a low profile, and is widely used.
しかし、上述の従来の逆Ｆアンテナは単共振の
アンテナであり、比帯域が小であるという欠点が
ある。板状放射導体板１０と接地導体板５との間
隔ｈを大きくしてアンテナ高さを高くすれば、比
帯域を大きくして広帯域化することができるが、
この場合ｈを大幅に大きくしなければならず、小
形低姿勢であるという逆Ｆアンテナの利点が損な
われてしまう。 However, the above-mentioned conventional inverted F antenna is a single-resonance antenna, and has the drawback of having a small fractional band. If the height of the antenna is increased by increasing the distance h between the plate-shaped radiation conductor plate 10 and the ground conductor plate 5, the specific band can be increased and the band can be widened.
In this case, h must be significantly increased, and the advantage of the inverted F antenna, which is its small size and low profile, is lost.
発明の目的
本発明の目的は、上述の従来の欠点を解決し、
小形低姿勢であるという逆Ｆアンテナの利点を損
なわないで広帯域化することができる複共振形逆
Ｆアンテナを提供することにある。OBJECT OF THE INVENTION The object of the invention is to solve the above-mentioned conventional drawbacks and
It is an object of the present invention to provide a multi-resonant inverted-F antenna that can provide a wide band without impairing the advantages of the inverted-F antenna of being small and low-profile.
発明の構成
本発明の複共振形逆Ｆアンテナは、接地導体板
に対向させた板状放射導体板と、該板状放射導体
板と接地導体板とを接続する短絡導体と、前記板
状放射導体板に給電するための給電線とを備えた
逆Ｆアンテナにおいて、前記板状放射導体板は誘
電体板表面に形成され、かつ複数の前記板状放射
導体板を層状に重ねて接地導体板に対して平行に
配置し、すべての前記板状放射導体板の一辺は短
絡板によつて相互に短絡されたことを特徴とす
る。Structure of the Invention The multi-resonant inverted F antenna of the present invention includes a plate-shaped radiation conductor plate facing a grounded conductor plate, a short-circuit conductor connecting the plate-shaped radiation conductor plate and the grounded conductor plate, and a plate-shaped radiation conductor plate that connects the plate-shaped radiation conductor plate and the grounded conductor plate. In the inverted F antenna, the plate-shaped radiation conductor plate is formed on the surface of the dielectric plate, and the plurality of plate-shaped radiation conductor plates are layered to form a ground conductor plate. , and one side of all the plate-shaped radiation conductor plates is short-circuited to each other by a short-circuit plate.
発明の実施例
次に、本発明について、図面を参照して詳細に
説明する。Embodiments of the Invention Next, the present invention will be described in detail with reference to the drawings.
第２図は、本発明の一実施例を示す斜視図であ
る。すなわち、厚さｔの誘電体板３の上面に上部
板状放射導体板１を形成し、下面に下部板状放射
導体板２を形成して、上部板状放射導体板１と下
部板状放射導体板２とは、誘電体板３の一側端面
において短絡板４によつて相互に短絡されてい
る。また、上部板状放射導体板１と下部板状放射
導体板２と誘電体板３とで構成される放射導体素
子は、誘電体ブロツク９によつて接地導体板５上
に所定間隔ｈに支持されている。また、上部板状
放射導体板１、下部板状放射導体板２は、短絡ピ
ン６によつて接地導体板５に電気的に短絡され、
短絡板４上の給電点には、同軸ケーブル８の中心
導体が給電線７として接続されている。 FIG. 2 is a perspective view showing one embodiment of the present invention. That is, an upper plate-like radiating conductor plate 1 is formed on the upper surface of the dielectric plate 3 having a thickness t, a lower plate-like radiating conductor plate 2 is formed on the lower surface, and the upper plate-like radiating conductor plate 1 and the lower plate-like radiating conductor plate 1 are connected to each other. The conductor plate 2 and the dielectric plate 3 are short-circuited to each other by a short-circuit plate 4 at one end surface of the dielectric plate 3 . Further, a radiation conductor element composed of an upper plate-shaped radiation conductor plate 1, a lower plate-shaped radiation conductor plate 2, and a dielectric plate 3 is supported on a ground conductor plate 5 at a predetermined interval h by a dielectric block 9. has been done. Further, the upper plate-shaped radiation conductor plate 1 and the lower plate-shaped radiation conductor plate 2 are electrically short-circuited to the ground conductor plate 5 by the shorting pin 6,
A center conductor of a coaxial cable 8 is connected to a feed point on the short circuit plate 4 as a feed line 7.
本実施例では、放射導体素子の上部板状放射導
体板１と下部板状放射導体板２の間には厚さｔの
誘電体板３が存在するため、上部板状放射導体板
１と下部板状放射導体板２に対する共振条件は、
給電点の位置によつて変化する。給電点を一定と
した場合は、上部板状放射導体板１の共振周波数
f1と下部板状放射導体板２の共振周波数f2とは誘
電体板３の厚さｔと、上部板状放射導体板１の寸
法11×13および下部板状放射導体板２の寸法11×
12で決定され、全体としては、相異なる２つの周
波数に共振する複共振のアンテナとして動作す
る。なお、上部板状放射導体板１と下部板状放射
導体板２の寸法が同じ場合（12＝13）においても
給電点の取り方によつては２周波で共振する。 In this embodiment, since a dielectric plate 3 having a thickness of t exists between the upper plate-like radiation conductor plate 1 and the lower plate-like radiation conductor plate 2 of the radiation conductor element, the upper plate-like radiation conductor plate 1 and the lower plate-like The resonance conditions for the plate-shaped radiation conductor plate 2 are as follows:
Varies depending on the location of the feed point. When the feeding point is fixed, the resonance frequency of the upper plate-shaped radiation conductor plate 1
f 1 and the resonant frequency f 2 of the lower plate-like radiating conductor plate 2 are the thickness t of the dielectric plate 3, the dimensions 1 1 × 1 3 of the upper plate-like radiating conductor plate 1, and the resonant frequency f 2 of the lower plate-like radiating conductor plate 2. Dimensions 1 1 x
1 2 , and as a whole operates as a multi-resonant antenna that resonates at two different frequencies. Note that even when the dimensions of the upper plate-shaped radiation conductor plate 1 and the lower plate-shaped radiation conductor plate 2 are the same (1 2 =1 3 ), resonance occurs at two frequencies depending on how the feeding point is arranged.
第３図は、上記実施例において、誘電体板３の
比誘電率εr＝4.4、厚さｔ＝1.6mmとし、上部板状
放射導体板１、下部板状放射導体板２の寸法を11
＝32mm、12＝42.5mm、13＝40mmとし、間隔ｈを10
mmとした場合のリターンロス特性を示す図であ
る。VSWRが２以下（リターンロス約9.6dB）の
帯域△ｆは、約64MHzであり、約7.2％の比帯域
幅を有している。 FIG. 3 shows that in the above embodiment, the relative dielectric constant εr of the dielectric plate 3 is 4.4, the thickness t is 1.6 mm, and the dimensions of the upper plate-shaped radiation conductor plate 1 and the lower plate-shaped radiation conductor plate 2 are 1 1
= 32 mm, 1 2 = 42.5 mm, 1 3 = 40 mm, and the interval h is 10
FIG. 3 is a diagram showing return loss characteristics when mm. The band Δf with a VSWR of 2 or less (return loss of about 9.6 dB) is about 64 MHz, and has a fractional bandwidth of about 7.2%.
第４図は、従来の逆Ｆアンテナ（36mm×40mmの
板状放射導体板１０（厚さ0.5mm）をｈ＝10mmの
間隔で接地導体板５に支持した場合）のリターン
ロス特性を示す。この場合はVSWR＝２（リター
ンロス9.6dB）で評価した比帯域幅は約4.3％であ
る。これに比して、上記実施例における比帯域幅
は約1.67倍あり、広帯域化が達成されている。な
お、上記実施例の複共振形逆Ｆアンテナが占有す
る体積は約15.8c.c.であり、アンテナの全高は11.6
mmであるから、従来例の体積約15.1c.c.、高さ10.5
mmとほぼ同程度である。すなわち、小形、低姿勢
という構造上の利点を損なわないで広帯域化が達
成されるという効果がある。なお、従来のアンテ
ナで同程度の比帯域幅を得るためには、約50mmの
高さが必要である。 FIG. 4 shows the return loss characteristics of a conventional inverted F antenna (a case in which a 36 mm x 40 mm radiating conductor plate 10 (thickness 0.5 mm) is supported on a ground conductor plate 5 at intervals of h=10 mm). In this case, the fractional bandwidth evaluated with VSWR = 2 (return loss 9.6 dB) is approximately 4.3%. Compared to this, the fractional bandwidth in the above embodiment is about 1.67 times, and a wide band is achieved. The volume occupied by the multi-resonant inverted F antenna of the above example is approximately 15.8 cc, and the total height of the antenna is 11.6 cc.
mm, the volume of the conventional example is approximately 15.1 cc and the height is 10.5 mm.
It is almost the same as mm. That is, there is an effect that a wide band can be achieved without sacrificing the structural advantages of small size and low profile. Note that in order to obtain the same relative bandwidth with a conventional antenna, a height of approximately 50 mm is required.
第５図は、上記実施例において、11＝34mm、12
＝13＝40mmとした場合のリターンロス特性を示
す。この場合は、VSWR＝２（リターンロス
9.6dB）以下の帯域が２つあり、２つの共振帯域
の比帯域は、それぞれ3.56％、2.75％である。従
つて、送信と受信で周波数が異なる２つの帯域を
使用する移動通信方式等に適用することができ
る。 Figure 5 shows that in the above example, 1 1 = 34 mm, 1 2
The return loss characteristics are shown when = 1 3 = 40 mm. In this case, VSWR=2 (return loss
There are two bands below 9.6 dB), and the fractional bands of the two resonance bands are 3.56% and 2.75%, respectively. Therefore, it can be applied to mobile communication systems that use two bands with different frequencies for transmission and reception.
第６図は、上部板状放射導体板１と下部板状放
射導体板２の短絡すべき１辺の近傍に、上部板状
放射導体板１、誘電体板３および下部板状放射導
体板２を貫通する短絡用ハトメ１３を複数個並べ
て取付けた実施例を示す。この場合も前述の実施
例と同様な効果を奏する。 FIG. 6 shows that the upper plate-like radiating conductor plate 1, the dielectric plate 3, and the lower plate-like radiating conductor plate 2 are placed near one side of the upper plate-like radiating conductor plate 1 and the lower plate-like radiating conductor plate 2 to be short-circuited. An embodiment is shown in which a plurality of short-circuiting eyelets 13 that pass through are attached in a row. In this case as well, the same effects as in the previous embodiment can be achieved.
第７図は、短絡ピン６を板状の短絡導体とし
て、短絡板４と短絡ピン６とを一体構造とした実
施例を示す。 FIG. 7 shows an embodiment in which the shorting pin 6 is a plate-shaped shorting conductor and the shorting plate 4 and the shorting pin 6 are integrally constructed.
第８図は、放射導体素子を複数の誘電体板３を
介して多層（３層以上）に構成して３以上の共振
帯域を有する複共振形逆Ｆアンテナを構成した実
施例を示す。 FIG. 8 shows an embodiment in which the radiation conductor element is constructed in multiple layers (three or more layers) via a plurality of dielectric plates 3 to construct a multi-resonant inverted F antenna having three or more resonance bands.
発明の効果
以上のように、本発明においては、誘電体板を
挟んで複数の板状放射導体板を形成して放射導体
素子を構成し、該放射導体素子の１辺で前記複数
の板状放射導体板を相互に短絡して、この辺上の
１点から給電するようにしたから、前記複数の板
状放射導体板によつて複数の共振帯域を有する逆
Ｆアンテナを提供できる。本発明のアンテナは、
小形、低姿勢で、広帯域なアンテナが要求される
移動通信方式のアンテナとして極めて有効であ
り、また、送受周波数の異なるような方式に対し
ても適用することが可能である。Effects of the Invention As described above, in the present invention, a radiation conductor element is configured by forming a plurality of plate-like radiation conductor plates with dielectric plates in between, and one side of the radiation conductor element forms a plurality of plate-like radiation conductor plates. Since the radiation conductor plates are short-circuited to each other and power is fed from one point on this side, an inverted F antenna having a plurality of resonance bands can be provided by the plurality of plate-shaped radiation conductor plates. The antenna of the present invention is
It is extremely effective as an antenna for mobile communication systems that require a small, low profile, and wideband antenna, and can also be applied to systems with different transmitting and receiving frequencies.
第１図は従来の逆Ｆアンテナの一例を示す斜視
図、第２図は、本発明の一実施例を示す斜視図、
第３図は上記実施例のリターンロス特性の一例を
示す図、第４図は従来例のリターンロス特性の一
例を示す図、第５図は本発明の一実施例であつて
２つの共振帯域が分離している場合のリターンロ
ス特性を示す図、第６図および第７図はそれぞれ
本発明の他の実施例を示す斜視図、第８図は本発
明のさらに別の実施例を示す側面図である。
図において、１：上部板状放射導体板、２：下
部板状放射導体板、３：誘電体板、４：短絡板、
５：接地導体板、６：短絡ピン、７：給電線、
８：同軸ケーブル、９：誘電体ブロツク、１３：
短絡用ハトメ。
FIG. 1 is a perspective view showing an example of a conventional inverted F antenna, FIG. 2 is a perspective view showing an embodiment of the present invention,
FIG. 3 is a diagram showing an example of the return loss characteristic of the above embodiment, FIG. 4 is a diagram showing an example of the return loss characteristic of the conventional example, and FIG. 5 is an example of the present invention, showing two resonance bands. FIGS. 6 and 7 are perspective views showing other embodiments of the present invention, and FIG. 8 is a side view showing still another embodiment of the present invention. It is a diagram. In the figure, 1: upper plate-shaped radiation conductor plate, 2: lower plate-shaped radiation conductor plate, 3: dielectric plate, 4: short circuit plate,
5: Grounding conductor plate, 6: Shorting pin, 7: Power supply line,
8: Coaxial cable, 9: Dielectric block, 13:
Grommets for short circuit.
Claims (1)
該板状放射導体板と接地導体板とを接続する短絡
導体と、前記板状放射導体板に給電するための給
電線とを備えた逆Ｆアンテナにおいて、前記板状
放射導体板は誘電体板表面に形成され、かつ複数
の前記板状放射導体板を層状に重ねて接地導体板
に対して平行に配置し、すべての前記板状放射導
体板の一辺は短絡板によつて相互に短絡されたこ
とを特徴とする複共振形逆Ｆアンテナ。1. A plate-shaped radiation conductor plate facing a ground conductor plate,
In the inverted F antenna comprising a short-circuit conductor connecting the plate-shaped radiation conductor plate and a ground conductor plate, and a feed line for feeding power to the plate-shaped radiation conductor plate, the plate-shaped radiation conductor plate is a dielectric plate. A plurality of the plate-shaped radiating conductor plates are formed on the surface and arranged in layers in parallel to a grounding conductor plate, and one side of all the plate-shaped radiating conductor plates is mutually short-circuited by a shorting plate. A multi-resonant inverted F antenna characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58165264A JPS6058704A (en) | 1983-09-09 | 1983-09-09 | Double resonance type inverted-f antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58165264A JPS6058704A (en) | 1983-09-09 | 1983-09-09 | Double resonance type inverted-f antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6058704A JPS6058704A (en) | 1985-04-04 |
| JPH0344443B2 true JPH0344443B2 (en) | 1991-07-08 |
Family
ID=15809022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58165264A Granted JPS6058704A (en) | 1983-09-09 | 1983-09-09 | Double resonance type inverted-f antenna |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6058704A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3596526B2 (en) * | 1999-09-09 | 2004-12-02 | 株式会社村田製作所 | Surface mounted antenna and communication device provided with the antenna |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1263745A (en) * | 1985-12-03 | 1989-12-05 | Nippon Telegraph & Telephone Corporation | Shorted microstrip antenna |
| JPS62131610A (en) * | 1985-12-03 | 1987-06-13 | Nec Corp | Antenna |
| JP2966553B2 (en) * | 1991-03-15 | 1999-10-25 | 松下電工株式会社 | Antenna device |
| JP2527054Y2 (en) * | 1991-03-15 | 1997-02-26 | 松下電工株式会社 | Top loading antenna |
| JPH09232854A (en) * | 1996-02-20 | 1997-09-05 | Matsushita Electric Ind Co Ltd | Small planar antenna system for mobile radio equipment |
| FR2752646B1 (en) * | 1996-08-21 | 1998-11-13 | France Telecom | FLAT PRINTED ANTENNA WITH SHORT-LAYERED ELEMENTS |
| KR100368939B1 (en) * | 2000-10-05 | 2003-01-24 | 주식회사 에이스테크놀로지 | An internal antenna having high efficiency of radiation and characteristics of wideband and a method of mounting on PCB thereof |
| FR2825837B1 (en) * | 2001-06-12 | 2006-09-08 | Cit Alcatel | MULTIBAND COMPACT ANTENNA |
| US6894650B2 (en) * | 2001-08-13 | 2005-05-17 | Molex Incorporated | Modular bi-polarized antenna |
| JP2003124742A (en) * | 2001-10-11 | 2003-04-25 | Samsung Electronics Co Ltd | Antenna |
| JP4730161B2 (en) * | 2006-03-20 | 2011-07-20 | 積水ハウス株式会社 | Ceiling structure of living room |
| KR101690259B1 (en) * | 2011-05-27 | 2016-12-28 | 삼성전자주식회사 | Antenna structure |
-
1983
- 1983-09-09 JP JP58165264A patent/JPS6058704A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3596526B2 (en) * | 1999-09-09 | 2004-12-02 | 株式会社村田製作所 | Surface mounted antenna and communication device provided with the antenna |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6058704A (en) | 1985-04-04 |
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