JPH0522018A - Reverse f antenna - Google Patents
Reverse f antennaInfo
- Publication number
- JPH0522018A JPH0522018A JP3198295A JP19829591A JPH0522018A JP H0522018 A JPH0522018 A JP H0522018A JP 3198295 A JP3198295 A JP 3198295A JP 19829591 A JP19829591 A JP 19829591A JP H0522018 A JPH0522018 A JP H0522018A
- Authority
- JP
- Japan
- Prior art keywords
- antenna
- inverted
- conductor part
- plate
- present
- 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.)
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- Waveguide Aerials (AREA)
- Details Of Aerials (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は携帯機等に設置するアン
テナであって逆Ｆ状の構造をもつ移動体通信用アンテナ
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna for mobile communication having an inverted F-shaped structure which is installed in a portable device or the like.
【０００２】[0002]
【従来の技術】従来の移動体通信の携帯機用アンテナの
１つに板状逆Ｆアンテナがある。これは、比較的小型・
低姿勢のため内蔵アンテナとして適している。又、移動
体通信に必要な水平面内に強い放射をもたせることが可
能である。更に携帯機の筐体の形によっては広帯域にな
る等の特徴をもつ。2. Description of the Related Art A plate-shaped inverted F antenna is one of conventional mobile communication antennas for mobile communication. This is relatively small
Suitable for a built-in antenna due to its low profile. It is also possible to have strong radiation in the horizontal plane required for mobile communication. Further, it has a feature that it has a wide band depending on the shape of the housing of the portable device.
【０００３】従来の板状逆Ｆアンテナの構造を図１４に
示す。図１４で（ａ）は斜視図、（ｂ）は正面図であ
り、１３は接地導体板、１４は放射導体板、１５は給電
ピン、１６は短絡導体板、５は同軸線路である。板状逆
Ｆアンテナの共振周波数ｆは実験的にｈ＝０．０３λの
ときＷ＋Ｌ≒λ／４で近似することができる。ここでλ
は共振周波数ｆの自由空間波長である。FIG. 14 shows the structure of a conventional plate-shaped inverted F antenna. 14A is a perspective view and FIG. 14B is a front view. 13 is a ground conductor plate, 14 is a radiation conductor plate, 15 is a feeding pin, 16 is a short-circuit conductor plate, and 5 is a coaxial line. The resonance frequency f of the plate-shaped inverted F antenna can be experimentally approximated to W + L≈λ / 4 when h = 0.03λ. Where λ
Is the free space wavelength of the resonance frequency f.
【０００４】図１５に従来の板状でない逆Ｆアンテナに
ついて示しており、（ａ）は斜視図、（ｂ）は正面図で
ある。図１４の放射導体板１４と短絡導体板１６を、棒
状の放射導体素子１７，短絡導体素子１９に置き換えた
もので、こちらの方が板状逆Ｆアンテナより古くからあ
り、板状逆Ｆアンテナの原形とも言える。なお、１８は
給電ピンである。逆Ｆアンテナの共振周波数は、実験的
にＬ＋ｈ≒λ／４で近似することができる。ここで、λ
は共振周波数ｆの自由空間波長である。逆Ｆアンテナ
は、板状逆Ｆアンテナに比べて通常帯域が狭く、指向性
は板状逆Ｆアンテナと同じくｘｙ面内で垂直偏波が無指
向性となる。逆Ｆアンテナも携帯機用アンテナとして使
用可能な特性を備えているが、その狭帯域特性のためあ
まり使用されていない。FIG. 15 shows a conventional non-plate-shaped inverted F antenna, in which (a) is a perspective view and (b) is a front view. The radiation conductor plate 14 and the short-circuit conductor plate 16 in FIG. 14 are replaced with a rod-shaped radiation conductor element 17 and a short-circuit conductor element 19, which is older than the plate inverted F antenna, and is a plate inverted F antenna. It can be said to be the original form of. In addition, 18 is a power feeding pin. The resonance frequency of the inverted F antenna can be experimentally approximated by L + h≈λ / 4. Where λ
Is the free space wavelength of the resonance frequency f. The inverted F antenna has a narrower normal band than the plate-shaped inverted F antenna, and the directivity is omnidirectional in the vertical polarization in the xy plane like the plate-shaped inverted F antenna. The inverted F antenna also has a characteristic that it can be used as an antenna for a portable device, but it is rarely used because of its narrow band characteristic.
【０００５】また、これらの板状逆Ｆアンテナ，逆Ｆア
ンテナの利得であるが、ダイポールアンテナを超えるこ
とはなく、通常マイナス数ｄＢ（ダイポール比）であ
る。Further, the gains of these plate-shaped inverted F antennas and inverted F antennas do not exceed the dipole antenna, and are usually a minus several dB (dipole ratio).
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、板状逆
Ｆアンテナは、図１４からもわかるように接地導体板１
３，放射導体板１４，短絡導体板１６を組合せて作られ
ており、構造的に複雑であるため、その製作にはかなり
の手間がかかる。また共振周波数は図１４のｈ，Ｌ，ｗ
で決定されるが、製作時の誤差で設計した周波数からず
れることが多く、製作後に調整が必要である。However, the plate-shaped inverted F antenna has the ground conductor plate 1 as shown in FIG.
3, the radiating conductor plate 14 and the short-circuiting conductor plate 16 are combined, and the structure is complicated, so that it takes a lot of time and effort to manufacture them. The resonance frequencies are h, L, and w in FIG.
However, it is often deviated from the designed frequency due to an error during manufacturing, and adjustment is required after manufacturing.
【０００７】また、逆Ｆアンテナは図１５からもわかる
ように接地導体板１３の上に棒状の素子を立体的に組み
合わせて作られており、板状逆Ｆアンテナほどではない
が複雑な構造であるため、製作に手間がかかる。更に、
板状逆Ｆアンテナと同じく、製作後に調整が必要で手間
が多くかかり、従来技術で述べたように狭帯域特性であ
る。Further, as can be seen from FIG. 15, the inverted F antenna is made by three-dimensionally combining rod-shaped elements on the ground conductor plate 13, and has a complicated structure, though not so much as the plate inverted F antenna. Therefore, it takes time to manufacture. Furthermore,
Similar to the plate-like inverted F antenna, adjustment is required after fabrication, which requires much labor, and has narrow band characteristics as described in the related art.
【０００８】本発明の目的は、これらの課題を解決し、
製作が簡単で無調整で簡単に使用することができ、比較
的帯域の広い逆Ｆアンテナを提供することにある。The object of the present invention is to solve these problems,
The purpose of the present invention is to provide an inverted F antenna having a relatively wide band, which is easy to manufacture, can be easily used without adjustment.
【０００９】[0009]
【課題を解決するための手段】この課題を解決するため
に、本発明による逆Ｆアンテナは、接地導体部と、該接
地導体部に対向させた放射導体部と、該放射導体部と前
記接地導体部を接続する短絡導体部と、前記放射導体部
に給電するための給電路とを備えた逆Ｆアンテナにおい
て、これらの構成要素が一枚の誘電体基板の表面のみあ
るいは表面と裏面に設けられた構成を有している。In order to solve this problem, an inverted F antenna according to the present invention comprises a ground conductor part, a radiation conductor part facing the ground conductor part, the radiation conductor part and the ground. In an inverted F antenna provided with a short-circuit conductor connecting the conductors and a feeding path for feeding the radiation conductor, these components are provided only on the front surface or on the front surface and the back surface of one dielectric substrate. It has a specific configuration.
【００１０】[0010]
【実施例】本発明について図面を参照して説明する。図
１はプリント基板をエッチングし、同軸線路５を接続し
て作製した本発明の一実施例を示す。図１において、１
は接地導体部、２は放射導体部、３は給電路、４は短絡
導体部、６は整合のための突出部で、これらは全てプリ
ント基板の銅張の部分であり、作製時には、この部分を
残すようにエッチングを行う。７は給電部で、同軸線路
５の中心導体と給電路３とを相互接続している。このと
き同軸線路５の外部導体は接地導体部１に接続される。
このアンテナは従来の逆Ｆアンテナと同じく近似的にＬ
＋ｈ≒λ／４のときに共振する。ここでλは、共振周波
数の自由空間波長である。整合のための突出部６は、ア
ンテナ給電部７における同軸線路５とアンテナの整合を
良くするためのもので、この部分の大きさと形状により
アンテナの入力インピーダンスを変化させることができ
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the drawings. FIG. 1 shows an embodiment of the present invention produced by etching a printed circuit board and connecting a coaxial line 5. In FIG. 1, 1
Is a ground conductor part, 2 is a radiating conductor part, 3 is a feeding line, 4 is a short-circuiting conductor part, and 6 is a protrusion for matching. These are all copper-clad parts of the printed circuit board. Etching is performed so as to leave. Reference numeral 7 denotes a power feeding portion, which interconnects the central conductor of the coaxial line 5 and the power feeding path 3. At this time, the outer conductor of the coaxial line 5 is connected to the ground conductor portion 1.
This antenna is similar to the conventional inverted-F antenna in L
Resonates when + h≈λ / 4. Where λ is the free space wavelength of the resonance frequency. The protruding portion 6 for matching is for improving the matching between the coaxial line 5 and the antenna in the antenna feeding portion 7, and the input impedance of the antenna can be changed by the size and shape of this portion.
【００１１】本実施例のアンテナは、厚さ１．６ｍｍの
片面銅張のフェノール樹脂基板を用いた。ｈ＝４０ｍ
ｍ，Ｌ＝７０ｍｍのとき、共振周波数ｆ＝７６２ＭＨｚ
であった。又整合は、図１（ａ）のＬ2 ＝２０ｍｍ，整
合のための突出部（縦×横）＝２９ｍｍ×３３ｍｍのと
き、５０Ωの特性インピーダンスの同軸線路と整合がと
れた。このアンテナのインピーダンス特性（図２）とＳ
ＷＲ特性（図３）は実験によると約１７％で、従来の逆
Ｆアンテナの７％に比べてはるかに広い。尚、このとき
に比較に用いた従来の逆Ｆアンテナは、図１５の構造で
Ｌ＝７０ｍｍ，ｈ＝４０ｍｍである。The antenna of this embodiment uses a 1.6 mm-thick single-sided copper-clad phenolic resin substrate. h = 40m
When m and L = 70 mm, resonance frequency f = 762 MHz
Met. When L 2 = 20 mm in FIG. 1A and the projection (length × width) for matching = 29 mm × 33 mm, matching was achieved with the coaxial line having a characteristic impedance of 50Ω. Impedance characteristics of this antenna (Fig. 2) and S
According to the experiment, the WR characteristic (FIG. 3) is about 17%, which is much wider than that of the conventional inverted F antenna of 7%. The conventional inverted F antenna used for comparison at this time has a structure of FIG. 15 with L = 70 mm and h = 40 mm.
【００１２】次に本実施例のアンテナの指向性を図４に
示す。図５は比較のために示したもので、通常基準アン
テナとされているダイポールアンテナの指向性である。
図４は本実施例のアンテナのｘｙ面内の指向性で、８は
垂直偏波、９は水平偏波である。図５はダイポールアン
テナのポールをＺ軸方向に合わせたときのｘｙ面内の指
向性で垂直偏波である。尚、図４，図５で中心から半径
方向は、電界強度を示す。図４，図５からわかるよう
に、本実施例のアンテナは、ｘｙ軸内で垂直偏波が無指
向性で利得もダイポールアンテナと比べて遜色なく、指
向性，利得共に従来の逆Ｆアンテナ，板状逆Ｆアンテナ
に比べてその特性は勝るとも劣らない。Next, the directivity of the antenna of this embodiment is shown in FIG. FIG. 5 is shown for comparison and shows the directivity of a dipole antenna which is usually used as a reference antenna.
FIG. 4 shows the directivity in the xy plane of the antenna of this embodiment, where 8 is vertical polarization and 9 is horizontal polarization. FIG. 5 shows vertical polarization with directivity in the xy plane when the pole of the dipole antenna is aligned with the Z-axis direction. The electric field strength is shown in the radial direction from the center in FIGS. As can be seen from FIGS. 4 and 5, the antenna of the present embodiment has non-directional vertical polarization in the xy axes and gain comparable to that of the dipole antenna. Both directivity and gain of the conventional inverted F antenna, Its characteristics are not inferior to those of the plate-shaped inverted F antenna.
【００１３】このように本発明のアンテナはプリント基
板をエッチングし、同軸ケーブルを接続するだけで製作
することができ、その過程は、従来の逆Ｆアンテナ，板
状逆Ｆアンテナと比べて簡単である。従って組立てなけ
ればならない従来の逆Ｆアンテナに比べて簡単に製作す
ることができる。又従来の逆Ｆアンテナは、組立て時に
Ｌ，Ｗ，ｈに誤差があるとそれがそのまま共振周波数の
ずれとなったため、製作後に調整が必要であったが、本
発明のアンテナは印刷技術を用いて製作すれば何枚でも
同じ形のアンテナを製作することができ、その誤差は極
めて小さいため、共振周波数のずれも小さく、製作後の
調整の必要がなく、また必要としても従来のものよりそ
の補正量がはるかに少ない。これらの特徴より本発明の
アンテナは安価で量産に適していて、しかもその特性は
従来のアンテナに比べて同等かそれ以上で再現性が大で
ある。尚、ここでは同軸線路５を直接、給電路３と接地
導体１に接続しているが、アンテナにコネクタを接続
し、コネクタと同軸線路を脱着することにより同軸線路
とアンテナを脱着可能としてもよい。As described above, the antenna of the present invention can be manufactured simply by etching the printed circuit board and connecting the coaxial cable. The process is simpler than the conventional inverted F antenna and plate-shaped inverted F antenna. is there. Therefore, it can be easily manufactured as compared with the conventional inverted F antenna which must be assembled. Further, in the conventional inverted F antenna, if there is an error in L, W, and h during assembly, the resonance frequency shifts as it is, so adjustment is necessary after manufacturing. However, the antenna of the present invention uses printing technology. You can make as many antennas as you like with the same shape, and since the error is extremely small, the deviation of the resonance frequency is also small, there is no need for adjustment after manufacturing, and if necessary, it is better than the conventional one. Much less correction. Due to these characteristics, the antenna of the present invention is inexpensive and suitable for mass production, and its characteristics are equal to or higher than those of conventional antennas, and reproducibility is large. Although the coaxial line 5 is directly connected to the feeding line 3 and the ground conductor 1 here, the coaxial line and the antenna may be detachable by connecting the connector to the antenna and detaching the connector and the coaxial line. ..
【００１４】図６は本発明の第２の実施例であり、両面
銅張プリント基板の片面に接地導体部１と整合のための
突出部６、反対側の面に給電路３と短絡導体部４、放射
導体部２を設けたものである。短絡導体部４と接地導体
部１は短絡ピン１０で短絡されている。同軸線路５の中
心導体は、プリント基板の片面にある給電路３に接続さ
れ、外部導体はプリント基板の反対側の面にある接地導
体部１に接続される。このときアンテナの特性は第１の
実施例と同じである。この例では、同軸線路とアンテナ
を直接に接続しているが、第１の実施例のようにコネク
タを介してもよい。図６では、ＳＭＡコネクタを接地部
１の側から取付ける事が可能で、この場合アンテナの特
性には、何等影響を与えない。FIG. 6 shows a second embodiment of the present invention. A double-sided copper-clad printed circuit board has a protrusion 6 for matching with the ground conductor 1 on one side, and a feeding path 3 and a short-circuit conductor on the opposite side. 4, the radiation conductor portion 2 is provided. The short-circuit conductor portion 4 and the ground conductor portion 1 are short-circuited by the short-circuit pin 10. The center conductor of the coaxial line 5 is connected to the feed line 3 on one surface of the printed board, and the outer conductor is connected to the ground conductor portion 1 on the opposite surface of the printed board. At this time, the characteristics of the antenna are the same as those of the first embodiment. In this example, the coaxial line and the antenna are directly connected, but they may be connected via a connector as in the first embodiment. In FIG. 6, the SMA connector can be attached from the side of the grounding portion 1, and in this case, the characteristics of the antenna are not affected at all.
【００１５】図７は本発明の第３の実施例で、第２の実
施例と同様に両面銅張プリント基板の片面に接地導体１
と整合のための突出部６、反対側の面に給電路３と短絡
導体部４、放射導体部２を設けている。短絡ピン１０で
短絡導体部４と接地導体部１とを短絡している。本実施
例は、マイクロストリップライン１１で給電している例
で、アンテナの入力インピーダンスとマイクロストリッ
プラインの特性インピーダンスは一致している。マイク
ロストリップラインの先端１２から先は、図７では省略
してあるが、コネクタを付けたり、同軸線路と接続して
外部へ信号を取り出してもよいし、アンテナと同一のプ
リント基板上に送信あるいは受信回路等を構成して、そ
のまま信号を処理してもよい。尚、この実施例の場合も
アンテナの特性は第１の実施例の場合と同じである。FIG. 7 shows a third embodiment of the present invention, in which the ground conductor 1 is provided on one side of the double-sided copper-clad printed circuit board as in the second embodiment.
And a projecting portion 6 for matching, and a feeding path 3, a short-circuit conductor portion 4, and a radiation conductor portion 2 on the opposite surface. The short-circuit pin 10 short-circuits the short-circuit conductor 4 and the ground conductor 1. In the present embodiment, the power is fed by the microstrip line 11, and the input impedance of the antenna and the characteristic impedance of the microstrip line match. Although not shown in FIG. 7 from the tip 12 of the microstrip line, a connector may be attached, a signal may be taken out to the outside by connecting with a coaxial line, or a signal may be transmitted on the same printed circuit board as the antenna. The signal may be processed as it is by configuring a receiving circuit or the like. Note that the characteristics of the antenna in this embodiment are the same as those in the first embodiment.
【００１６】図８は本発明の第４の実施例で、整合のた
めの突出部を設けずにその代わりに放射導体部２の先端
を接地導体部１の方へ折り曲げてある。このようにする
と突出部がなくてもアンテナと同軸線路との整合がとれ
る。このとき共振周波数は、放射導体部がＬだけの時と
比べてＬ3 の長さの分だけ下がる。FIG. 8 shows a fourth embodiment of the present invention in which a protrusion for matching is not provided, but instead the tip of the radiation conductor 2 is bent toward the ground conductor 1. In this way, the antenna and the coaxial line can be matched without the protrusion. At this time, the resonance frequency is lowered by the length of L 3 as compared with the case where the radiation conductor portion is L only.
【００１７】図９は本発明の第５の実施例で、整合のた
めの突出部を設けない例である。この例のように突出部
がなくてもアンテナと同軸線路の整合がとれる場合があ
る。本実施例は、厚さ１．６ｍｍの片面銅張のフェノー
ル樹脂基板を用いた。ｈ＝５ｍｍ，Ｌ＝２４ｍｍのとき
共振周波数ｆ＝１．９ＧＨｚであった。又Ｌ2 ＝２．２
ｍｍのとき特性インピーダンス５０Ωの同軸線路と整合
がとれた。このアンテナのインピーダンス特性とＳＷＲ
特性を図１０，図１１に示す。このときのＳＷＲが２以
下の帯域は、約９％となった。FIG. 9 shows a fifth embodiment of the present invention, which is an example in which a protrusion for alignment is not provided. As in this example, the antenna and the coaxial line may be matched without the protrusion. In this example, a 1.6 mm-thick single-sided copper-clad phenolic resin substrate was used. When h = 5 mm and L = 24 mm, the resonance frequency was f = 1.9 GHz. Also L 2 = 2.2
When the thickness was mm, the coaxial line with a characteristic impedance of 50Ω was matched. Impedance characteristics and SWR of this antenna
The characteristics are shown in FIGS. At this time, the band where the SWR was 2 or less was about 9%.
【００１８】第６の実施例は、図１の構造を有してい
て、１．９ＧＨｚ帯に共振させたものである。図１にお
いて、ｈ＝１５．５ｍｍ，Ｌ＝２２ｍｍでＬ2＝８ｍｍ
のとき、ほぼ１．９ＧＨｚに共振した。尚、整合のため
の突出部は、（縦×横）＝８ｍｍ×１７ｍｍである。こ
のアンテナのインピーダンス特性とＳＷＲ特性を図１
２，図１３に示す。このときのＳＷＲが２以下の帯域は
１６．５％となった。The sixth embodiment has the structure shown in FIG. 1 and resonates in the 1.9 GHz band. In FIG. 1, h = 15.5 mm, L = 22 mm and L 2 = 8 mm
At that time, it resonated at about 1.9 GHz. The protrusion for alignment is (length × width) = 8 mm × 17 mm. Figure 1 shows the impedance and SWR characteristics of this antenna.
2, shown in FIG. At this time, the band in which the SWR was 2 or less was 16.5%.
【００１９】[0019]
【発明の効果】以上詳細に説明したように、本発明で
は、従来の逆Ｆアンテナに比べて安価で量産に適した逆
Ｆアンテナが供給され、しかもその特性は、従来の逆Ｆ
アンテナに比べて同等かそれ以上である。従って、実用
的効果は極めて大きい。As described in detail above, according to the present invention, an inverse F antenna which is cheaper than the conventional inverse F antenna and suitable for mass production is supplied, and the characteristics thereof are the same as those of the conventional inverse F antenna.
Equal to or better than the antenna. Therefore, the practical effect is extremely large.
【図１】本発明の第１の実施例を示す斜視図と一部拡大
図である。FIG. 1 is a perspective view and a partially enlarged view showing a first embodiment of the present invention.
【図２】図１の実施例におけるインピーダンス特性図で
ある。FIG. 2 is an impedance characteristic diagram in the embodiment of FIG.
【図３】図１の実施例におけるＳＷＲ特性である。FIG. 3 is a SWR characteristic in the embodiment of FIG.
【図４】図１の実施例における指向特性である。FIG. 4 is a directional characteristic in the embodiment of FIG.
【図５】ダイポールアンテナの指向特性である。FIG. 5 is a directional characteristic of a dipole antenna.
【図６】本発明の第２の実施例を示す斜視図及び一部拡
大図である。FIG. 6 is a perspective view and a partially enlarged view showing a second embodiment of the present invention.
【図７】本発明の第３の実施例の斜視図である。FIG. 7 is a perspective view of a third embodiment of the present invention.
【図８】本発明の第４の実施例を示す斜視図及び一部拡
大図である。FIG. 8 is a perspective view and a partially enlarged view showing a fourth embodiment of the present invention.
【図９】本発明の第５の実施例を示す斜視図及び一部拡
大図である。FIG. 9 is a perspective view and a partially enlarged view showing a fifth embodiment of the present invention.
【図１０】本発明の第５の実施例のアンテナのインピー
ダンス特性図である。FIG. 10 is an impedance characteristic diagram of the antenna of the fifth embodiment of the present invention.
【図１１】本発明の第５の実施例のＳＷＲ特性図であ
る。FIG. 11 is a SWR characteristic diagram of the fifth embodiment of the present invention.
【図１２】本発明の第６の実施例のインピーダンス特性
図である。FIG. 12 is an impedance characteristic diagram of the sixth embodiment of the present invention.
【図１３】本発明の第６の実施例のＳＷＲ特性図であ
る。FIG. 13 is a SWR characteristic diagram of the sixth embodiment of the present invention.
【図１４】従来の板状逆Ｆアンテナを示す斜視図とＡ−
Ａ断面図である。FIG. 14 is a perspective view showing a conventional plate-shaped inverted F antenna and FIG.
FIG.
【図１５】従来の逆Ｆアンテナを示す斜視図とＢ−Ｂ断
面図である。FIG. 15 is a perspective view and a BB cross-sectional view showing a conventional inverted F antenna.
１ 接地導体部 ２ 放射導体部 ３ 給電路 ４ 短絡導体部 ５ 同軸線路 ６ 整合のための突出部 ７ 給電部 １０ 短絡ピン １１ マイクロストリップライン １２ マイクロストリップラインの先端 １３ 接地導体板 １４ 放射導体板 １５，１８ 給電ピン １６ 短絡導体板 １７ 放射導体素子 DESCRIPTION OF SYMBOLS 1 Ground conductor part 2 Radiation conductor part 3 Feed line 4 Short-circuit conductor part 5 Coaxial line 6 Protrusion for matching 7 Feed part 10 Short-circuit pin 11 Microstrip line 12 Microstrip line tip 13 Ground conductor plate 14 Radiation conductor plate 15 , 18 Feed pin 16 Short-circuit conductor plate 17 Radiation conductor element
Claims (1)
た放射導体部と、該放射導体部と前記接地導体部を接続
する短絡導体部と、前記放射導体部に給電するための給
電路とを備えた逆Ｆアンテナにおいて、前記各構成要素
が１枚の誘電体基板の表面のみあるいは表面と裏面に設
けられることを特徴とする逆Ｆアンテナ。Claims: 1. A ground conductor portion, a radiation conductor portion facing the ground conductor portion, a short-circuit conductor portion connecting the radiation conductor portion and the ground conductor portion, and the radiation conductor portion. An inverse F antenna provided with a power feeding path for feeding to an antenna, wherein each of the constituent elements is provided only on the front surface or the front surface and the back surface of one dielectric substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3198295A JPH0522018A (en) | 1991-07-15 | 1991-07-15 | Reverse f antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3198295A JPH0522018A (en) | 1991-07-15 | 1991-07-15 | Reverse f antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0522018A true JPH0522018A (en) | 1993-01-29 |
Family
ID=16388756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3198295A Pending JPH0522018A (en) | 1991-07-15 | 1991-07-15 | Reverse f antenna |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0522018A (en) |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09500246A (en) * | 1993-07-09 | 1997-01-07 | テレフオンアクチーボラゲツト エル エム エリクソン | Cordless wireless communication device and antenna |
| WO2001073889A1 (en) * | 2000-03-29 | 2001-10-04 | Seiko Epson Corporation | Antenna for high-frequency radio, high-frequency radio device and high-frequency radio device of watch type |
| WO2002039547A1 (en) * | 2000-11-07 | 2002-05-16 | Siemens Aktiengesellschaft | Inverted-f antenna |
| JP2004363848A (en) * | 2003-06-04 | 2004-12-24 | Taiyo Yuden Co Ltd | Antenna-mounted substrate and pc card equipped with same |
| US6847329B2 (en) | 2002-07-09 | 2005-01-25 | Hitachi Cable, Ltd. | Plate-like multiple antenna and electrical equipment provided therewith |
| JP2005057357A (en) * | 2003-08-06 | 2005-03-03 | Mitsubishi Materials Corp | Antenna board and antenna module |
| US6870504B2 (en) | 2002-03-27 | 2005-03-22 | Hitachi Cable, Ltd. | Plate antenna and electric appliance therewith |
| US6917333B2 (en) | 2001-11-09 | 2005-07-12 | Hitachi Cable Ltd. | Flat-plate antenna and method for manufacturing the same |
| JP2006319629A (en) * | 2005-05-12 | 2006-11-24 | Tyco Electronics Amp Kk | Flat antenna |
| WO2007000898A1 (en) * | 2005-06-27 | 2007-01-04 | Matsushita Electric Industrial Co., Ltd. | Antenna device |
| JP2007295051A (en) * | 2006-04-21 | 2007-11-08 | Sony Corp | Antenna and electronic apparatus |
| EP1856766A1 (en) * | 2005-02-01 | 2007-11-21 | Cypress Semiconductor Corporation | Antenna with multiple folds |
| EP2005518A2 (en) * | 2006-03-28 | 2008-12-24 | QUALCOMM Incorporated | Modified inverted-f antenna for wireless communication |
| JP2012147263A (en) * | 2011-01-12 | 2012-08-02 | Sony Corp | Antenna module and radio communication equipment |
| JP2012182603A (en) * | 2011-02-28 | 2012-09-20 | Mitsubishi Materials Corp | Antenna device |
| JP2013138296A (en) * | 2011-12-28 | 2013-07-11 | Mitsumi Electric Co Ltd | Antenna device |
| GB2573149A (en) * | 2018-04-26 | 2019-10-30 | Airspan Networks Inc | Technique for tuning the resonance frequency of an electric-based antenna |
| WO2024179956A1 (en) * | 2023-02-28 | 2024-09-06 | BSH Hausgeräte GmbH | Multiband loop antenna with extended bandwidth |
-
1991
- 1991-07-15 JP JP3198295A patent/JPH0522018A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09500246A (en) * | 1993-07-09 | 1997-01-07 | テレフオンアクチーボラゲツト エル エム エリクソン | Cordless wireless communication device and antenna |
| WO2001073889A1 (en) * | 2000-03-29 | 2001-10-04 | Seiko Epson Corporation | Antenna for high-frequency radio, high-frequency radio device and high-frequency radio device of watch type |
| US6762728B2 (en) | 2000-03-29 | 2004-07-13 | Seiko Epson Corporation | Antenna device for high-frequency radio apparatus and wrist watch-type radio apparatus |
| JP3941504B2 (en) * | 2000-03-29 | 2007-07-04 | セイコーエプソン株式会社 | Antenna device for high frequency radio equipment, high frequency radio equipment and watch type high frequency radio equipment |
| WO2002039547A1 (en) * | 2000-11-07 | 2002-05-16 | Siemens Aktiengesellschaft | Inverted-f antenna |
| US7318268B2 (en) | 2001-11-09 | 2008-01-15 | Hitachi Cable, Ltd. | Method for making flat antenna |
| US6917333B2 (en) | 2001-11-09 | 2005-07-12 | Hitachi Cable Ltd. | Flat-plate antenna and method for manufacturing the same |
| US6870504B2 (en) | 2002-03-27 | 2005-03-22 | Hitachi Cable, Ltd. | Plate antenna and electric appliance therewith |
| US6847329B2 (en) | 2002-07-09 | 2005-01-25 | Hitachi Cable, Ltd. | Plate-like multiple antenna and electrical equipment provided therewith |
| JP2004363848A (en) * | 2003-06-04 | 2004-12-24 | Taiyo Yuden Co Ltd | Antenna-mounted substrate and pc card equipped with same |
| JP2005057357A (en) * | 2003-08-06 | 2005-03-03 | Mitsubishi Materials Corp | Antenna board and antenna module |
| US7936318B2 (en) | 2005-02-01 | 2011-05-03 | Cypress Semiconductor Corporation | Antenna with multiple folds |
| EP1856766A1 (en) * | 2005-02-01 | 2007-11-21 | Cypress Semiconductor Corporation | Antenna with multiple folds |
| EP1856766A4 (en) * | 2005-02-01 | 2008-07-23 | Cypress Semiconductor Corp | Antenna with multiple folds |
| US8692732B2 (en) | 2005-02-01 | 2014-04-08 | Purlieu Wireless Ltd. Llc | Antenna with multiple folds |
| JP2006319629A (en) * | 2005-05-12 | 2006-11-24 | Tyco Electronics Amp Kk | Flat antenna |
| WO2007000898A1 (en) * | 2005-06-27 | 2007-01-04 | Matsushita Electric Industrial Co., Ltd. | Antenna device |
| EP2005518A4 (en) * | 2006-03-28 | 2014-06-04 | Qualcomm Inc | Modified inverted-f antenna for wireless communication |
| JP2009531978A (en) * | 2006-03-28 | 2009-09-03 | クゥアルコム・インコーポレイテッド | Modified inverted-F antenna for wireless communication |
| JP2012120191A (en) * | 2006-03-28 | 2012-06-21 | Qualcomm Inc | Modified inverted-f antenna for wireless communication |
| EP2005518A2 (en) * | 2006-03-28 | 2008-12-24 | QUALCOMM Incorporated | Modified inverted-f antenna for wireless communication |
| JP2007295051A (en) * | 2006-04-21 | 2007-11-08 | Sony Corp | Antenna and electronic apparatus |
| JP2012147263A (en) * | 2011-01-12 | 2012-08-02 | Sony Corp | Antenna module and radio communication equipment |
| JP2012182603A (en) * | 2011-02-28 | 2012-09-20 | Mitsubishi Materials Corp | Antenna device |
| JP2013138296A (en) * | 2011-12-28 | 2013-07-11 | Mitsumi Electric Co Ltd | Antenna device |
| GB2573149A (en) * | 2018-04-26 | 2019-10-30 | Airspan Networks Inc | Technique for tuning the resonance frequency of an electric-based antenna |
| US11189928B2 (en) | 2018-04-26 | 2021-11-30 | Airspan Ip Holdco Llc | Technique for tuning the resonance frequency of an electric-based antenna |
| GB2573149B (en) * | 2018-04-26 | 2022-08-10 | Airspan Ip Holdco Llc | Technique for tuning the resonance frequency of an electric-based antenna |
| WO2024179956A1 (en) * | 2023-02-28 | 2024-09-06 | BSH Hausgeräte GmbH | Multiband loop antenna with extended bandwidth |
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