JPS6080302A - Broad band small-sized antenna built in portable radio equipment - Google Patents
Broad band small-sized antenna built in portable radio equipmentInfo
- Publication number
- JPS6080302A JPS6080302A JP18846483A JP18846483A JPS6080302A JP S6080302 A JPS6080302 A JP S6080302A JP 18846483 A JP18846483 A JP 18846483A JP 18846483 A JP18846483 A JP 18846483A JP S6080302 A JPS6080302 A JP S6080302A
- Authority
- JP
- Japan
- Prior art keywords
- antenna element
- antenna
- matching
- plate
- 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.)
- Granted
Links
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
- H01Q9/0421—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with a shorting wall or a shorting pin at one end of the element
Abstract
Description
【発明の詳細な説明】
（技術分野）
本発明は携帯無線機の内蔵広゛帯域小形アンテナに関す
るものである。DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a built-in wideband small antenna for a portable radio.
（従来例）
従来の携帯形無線機のアンテナの大部分は半波長グイポ
ール方式によるものであるが、外付着脱形であり無線機
の取扱いにおいて不便である。(Conventional example) Most of the antennas of conventional portable radio devices are based on the half-wavelength Goupole system, but the antennas are attached and removed from the outside, which is inconvenient in handling the radio device.
又、内蔵形アンテナとして従来用いられているものに第
１図に示す逆Ｆ形アンテナがある。このアンテナの場合
、周波数広帯賊（比帯域１０％程度）を得るためには、
高さｈ及び素子の半径ａ等に十分な寸法を必要とするた
め、内蔵形の要求に対して比較的大きな容積（特に高さ
ｈ方向）を必要とした。Furthermore, an inverted F-type antenna shown in FIG. 1 has been conventionally used as a built-in antenna. In the case of this antenna, in order to obtain a wide frequency band (approx. 10% fractional band),
Since sufficient dimensions are required for the height h and the radius a of the element, a relatively large volume (especially in the height h direction) is required compared to the requirement for a built-in type.
（発明の目的）
本発明はこれらの欠点を解決するとともに、広帯域幅に
インピーダンス整合が行える小形内蔵アンテナを提供す
るものであり、以下詳細に説明する。(Object of the Invention) The present invention solves these drawbacks and provides a small built-in antenna that can perform impedance matching over a wide bandwidth, and will be described in detail below.
（発明の構成）
本発明は、携帯無線機内賦形広帯域小型アンテナであっ
て、基板と導体を積層にして成る平板形状のアンテナ素
子と、該アンテナ素子と略平行に設けられる導体アース
基板上、前記アンテナ素子と接続される給電線と、前記
アンテナ素子の一端において両側面で異なる幅をもった
貼シ合わせ面をなし前記導体アース基板と間隙をあけて
対向略平行に固定接続し前記給電線の苛性インピーダン
スと前記アンテナのインピーダンスのマツチングをとる
マツチング用ノヨート板とから構成され、前記アンテナ
素子の接合端の反対端から該端部に隣り合う両側面と前
記反対端に近い前記マツチングショート板の接合縁部と
の２つの交点Ｐ、Ｑｔでの長さのうち短い方の長さｔｌ
によって所要周波数帯の高い方を決定し、長い方の長さ
ｔ２によって所要周波数帯の低い方を決定し、更に前記
給電線の前記アンテナ素子との接続点である給電点から
前記交点Ｐ、Ｑｔでの長さにおいて短かい方をｄｌ長い
方をｄ２とした場合に前記長さｔｌとｄｌ ｔｌ
ｔ２との関係が一ターとなるように前記給電点ｄ２ ｔ
２
の位置を決定することを特徴とする携帯無線機内賦形広
帯域小型アンテナである。(Structure of the Invention) The present invention is a small broadband antenna embedded in a portable wireless device, which includes a flat antenna element formed by laminating a substrate and a conductor, a conductive earth substrate provided substantially parallel to the antenna element, A feeder line connected to the antenna element, and the feeder line, which has a bonding surface with different widths on both sides at one end of the antenna element, and is fixedly connected to the conductor ground board in a manner substantially parallel to the conductor with a gap therebetween. a matching short plate that matches the caustic impedance of the antenna element and the impedance of the antenna, and both sides adjacent to the end opposite to the joint end of the antenna element, and the matching short plate near the opposite end. The shorter length tl of the lengths at the two intersections P and Qt with the joint edge of
The higher required frequency band is determined by the length t2 of the longer one, and the lower required frequency band is determined by the length t2 of the longer one. When the shorter one is dl and the longer one is d2, the feeding point d2 t is set so that the relationship between the length tl and dl tl t2 is equal to t.
2. This is a small broadband antenna built into a portable radio device, which is characterized by determining the position of the antenna.
（第１の実施例）
第２図は本発明に係る携帯無線機内賦形広帯域小型アン
テナの第１の実施例を示す構造図であり、（ａ）は平面
図、（ｂ）は側面図である。同図において、１はアンテ
ナ素子、２はマツチング用ショート板、３は給電点、４
はアース基板、５は給電線であり、Ｚｌ ＋ Ｚ２ ＋
ｄｌ ＋ ｄ２ ＋ ｈ ＋ ｗは各部の寸法を示す
。アンテナ素子Ｉはガラスエポキ／基板の上−面と裏面
に導体・ぞターンを貼った平板上のものである。アース
基板４は本体のフレーム（シャーン）を兼ね／こもので
あり、これに第２図に示すようにマツチング用ショート
板２が取シ付けられている。(First Embodiment) FIG. 2 is a structural diagram showing a first embodiment of a small broadband antenna embedded in a portable wireless device according to the present invention, in which (a) is a plan view and (b) is a side view. be. In the figure, 1 is an antenna element, 2 is a matching short plate, 3 is a feeding point, and 4 is a matching short plate.
is the ground board, 5 is the power supply line, Zl + Z2 +
dl + d2 + h + w indicates the dimensions of each part. The antenna element I is on a flat plate with conductor strips pasted on the top and back sides of a glass epoxy/substrate. The ground board 4 also serves as a frame of the main body, and a matching short board 2 is attached to it as shown in FIG. 2.
（本実施例の場合、アース基板４とマツチング用／ヨー
ド板２は銅板にて一体の構造となっている。）そして、
マツチング用ンヨ−１・板２のアース基板４に対して直
立している部分２ａは、第２図（ａ）の平面図に示すよ
うにアンテナ素子ｌの右端のエツジに対しである角度θ
をなしている。平板形状のアンテナ素子１は一端をマツ
チング用ショート板２に固定され、アース基板４と間隔
りを開けてほぼ平行に設けられる。又、給電線５はアー
ス基板４の下方からアンテナ素子１に取り付けられ、こ
のアンテナ素子１との接続点が給電点３である。(In the case of this embodiment, the grounding board 4 and the matching/iodine board 2 are made of a copper plate and have an integral structure.)
As shown in the plan view of FIG. 2(a), the portion 2a of the matching plate 1 and plate 2 that stands upright with respect to the ground substrate 4 is at a certain angle θ with respect to the right edge of the antenna element l, as shown in the plan view of FIG.
is doing. A flat plate-shaped antenna element 1 has one end fixed to a matching short plate 2, and is provided substantially parallel to a grounding board 4 with an interval therebetween. Further, the feed line 5 is attached to the antenna element 1 from below the ground board 4, and the connection point with the antenna element 1 is the feed point 3.
第２図（ａ）の平面図において、マ、テングンヨ−１・
゛板２の左端の立上り部２ａが平板形状アンテナ素子ｌ
の上の長辺との交点をＰ１下の長辺との交点をＱとし、
アンテナ素子ｌの左端から前記Ｑ点までの長さをｔ１１
アンテナ素子ｌの左端から前記Ｐ点寸での長さをＬ２と
する。長さｔｌとｔ２はマツチング用ショート板２の左
端の立上り部２ａがアンテナ素子１の右端のエツジとな
す角θならびにアンテナ素子１の幅Ｗによって変化する
ものであるが、この長さｔｌが該アンテナの所要周波数
帯幅の上限を決め、長さＬ２が下限を決める。In the plan view of Fig. 2(a), Ma, Tengunyo-1,
゛The rising part 2a at the left end of the plate 2 is a flat plate antenna element l.
The intersection with the upper long side is P1, the intersection with the lower long side is Q,
The length from the left end of antenna element l to the Q point is t11
Let L2 be the length from the left end of the antenna element l to the point P. The lengths tl and t2 vary depending on the angle θ that the left end rising portion 2a of the matching short plate 2 makes with the right end edge of the antenna element 1 and the width W of the antenna element 1. The upper limit of the required frequency bandwidth of the antenna is determined, and the length L2 determines the lower limit.
従って１１とｔ２との差が大きい場合、すなわち角度θ
が大きく幅Ｗが大きい場合に周波数帯幅は広帯域となる
。又マツチングショート板２のうちアース基板４上直立
している立上り部２ａならびにアンテナ素子１と重なっ
ている部分２ｂは給電線５のザーノインピーダンスとア
ンテナ素子１のインピーダンス整合をとる機能を有する
が、更に給電点３と前記Ｐ点との長さｄｌならびに給電
点３と前記Ｑ点との長さｄ２によりインピーダンス整合
用トラップ回路を最適にし、インピーダンス整合を図る
ことができる。長さｄｌとｄ２は前記関係にあることが
実験から明らかである。したがって、このような関係と
なるように給電点３の最適位置を決定することによって
、広帯域にインピーダンス整合が行なえることになる。Therefore, if the difference between 11 and t2 is large, that is, the angle θ
When the width W is large and the width W is large, the frequency band becomes wide. In addition, the rising portion 2a of the matching short plate 2 that stands upright on the ground board 4 and the portion 2b that overlaps with the antenna element 1 have the function of matching the impedance of the feeder line 5 and the antenna element 1. Further, the impedance matching trap circuit can be optimized by the length dl between the feeding point 3 and the point P and the length d2 between the feeding point 3 and the Q point, and impedance matching can be achieved. It is clear from experiments that the lengths dl and d2 have the above relationship. Therefore, by determining the optimum position of the feeding point 3 so as to have such a relationship, impedance matching can be performed over a wide band.
本実施例の場合、９００ ＭＨｚ帯において帯域幅を８
０ Ｍｌ（７，以上とし、ＶＳＷＲ（Ｖｏｌｔａｇｅ
ＳｔａｎｄｉｎｇＷａｖｅ ＲａＴｉｏ）が１９（反射
減衰量１０ ｄＢ ）以下とした場合、各部の寸法は略
Ａ１＝６７ｍｍ、ｔ２−８６肺、ｄ１＝２６ Ｗｎｌ、
ｄ２＝３４ ｔｍｎ、ｈ＝１０ｍｍ、ｗ＝３５ｍｍ、
θ−３０°、（ガラスエポキシ基板の厚さは１．６ ｍ
）である。In the case of this example, the bandwidth is set to 8 in the 900 MHz band.
0 Ml (7, or more, VSWR (Voltage
When the Standing Wave RaTio) is 19 (return loss 10 dB) or less, the dimensions of each part are approximately A1 = 67 mm, t2-86 lung, d1 = 26 Wnl,
d2=34tmn, h=10mm, w=35mm,
θ-30°, (the thickness of the glass epoxy board is 1.6 m
).
以上説明したように、第１の実施例ではアンテナ高が一
般の逆Ｆ形アンテナに比較して小さく、又広帯域のイン
ピーダンス整合が容易かつ安定に得られる利点がある。As explained above, the first embodiment has the advantage that the antenna height is smaller than that of a general inverted F-type antenna, and that broadband impedance matching can be easily and stably obtained.
（第２の実施例）
第１の実施例の場合、アンテナ素子１は１枚のガラスエ
ポキシ基板の上面と裏面に導体・ぐターンを貼った構造
のものであり、ガラスエポキシ基板の厚さが一定である
為、」二下の導体によって決まる共振回路の結合係数が
可変にできず、周波数帯域幅を広げた場合に帯域内の中
央付近で少しインピーダンス整合が低下することがある
。そこで第１の実施例で説明した長さ１．．１２とは異
なる長さｔ３の基板を重ねて積層基板にてアンテナ素子
１を構成したものを次に説明する。(Second Embodiment) In the case of the first embodiment, the antenna element 1 has a structure in which a conductor pattern is pasted on the top and back surfaces of one glass epoxy substrate, and the thickness of the glass epoxy substrate is Because it is constant, the coupling coefficient of the resonant circuit determined by the two conductors cannot be varied, and when the frequency bandwidth is widened, the impedance matching may deteriorate slightly near the center of the band. Therefore, the length 1. explained in the first embodiment. ．． Next, an antenna element 1 constructed from a laminated substrate made by stacking substrates having a length t3 different from 12 will be described.
第３図は本発明に係る携帯無線機内賦形広帯域小形アン
テナの第２の実施例を示す構造図であり、（、）は平面
図、（ｂ）は側面図である。同図において１ａ、１ｂは
異なる長さの基板であシ、上面、中間層、下面各々に導
体パターンを貼って積層構造にてアンテナを構成するも
のであり、他の記号は第２図と同じものを示す。FIG. 3 is a structural diagram showing a second embodiment of a small broadband antenna embedded in a portable wireless device according to the present invention, where (,) is a plan view and (b) is a side view. In the same figure, 1a and 1b are substrates of different lengths, and conductor patterns are pasted on the top, middle layer, and bottom surfaces, respectively, to construct the antenna in a laminated structure.Other symbols are the same as in Figure 2. show something
第４図は本発明に係る実施例におけるアンテナの所要周
波数帯幅とＶＳＷＲならびに反射減衰量（ｄＢ）の関係
を示すものである。第４図（ａ）は既述した第１の実施
例の場合の特性を示し、所要周波数帯幅ｒＬ−ｆｕでＶ
ＳＷＲが１９（反射減衰量１０．１６ ｄＢ ）以下と
したものを示す。周波数帯幅の上限ｆのヌルポイント■
はアンテナ素子１の前記長さ１．によって決まり、下限
ｆＬのヌルポイントＯはアンテナ素子１の前記長さｔ２
によって決捷る。一方、第４図（１））に第２の実施例
における特性を示し、第１の実施例と同じ＜ ９００
ＭＨｚ帯において帯域幅を８０ ＭＩ（７，以上とした
場合について示す。この場合、前記長さｔ３によって決
められる周波数帯において、第２の導体基板（第３図に
おける基板１ａ）を積層に設けたことによってヌルポイ
ントＯができるだめ、ＶＳＷＲは１７（反射減衰量１１
．７３ ｄＢ ）以下となる。従って同じＶＳＷＲ値の
ものに対して、第２の実施例によるアンテナは第１の実
施例によるアンテナに対して周波数帯幅をより広帯域に
することができる。FIG. 4 shows the relationship between the required frequency bandwidth of the antenna, VSWR, and return loss (dB) in an embodiment of the present invention. FIG. 4(a) shows the characteristics in the case of the first embodiment described above, in which V
The SWR is 19 (return loss: 10.16 dB) or less. Null point of upper limit f of frequency bandwidth■
is the length 1. of the antenna element 1. The null point O of the lower limit fL is determined by the length t2 of the antenna element 1.
Decide by. On the other hand, FIG. 4 (1)) shows the characteristics of the second embodiment, and the same < 900 as in the first embodiment.
The case where the bandwidth is 80 MI (7,000 MHz or more) in the MHz band is shown. In this case, in the frequency band determined by the length t3, the second conductive substrate (substrate 1a in FIG. 3) is provided in a stacked manner. As a result, a null point O is created, and the VSWR is 17 (return loss 11
．． 73 dB) or less. Therefore, for the same VSWR value, the antenna according to the second embodiment can have a wider frequency band than the antenna according to the first embodiment.
（発明の効果）
本発明による平板形状内蔵アンテナは小型にて比帯域が
極めて大きくとれるため、携帯形無線電話の如く送受信
周波数間隔が広く、使用チャンネル周波数の多い、小容
量、軽重量の無線装置の送受１菖共用内蔵アンテナとし
て利用することができる。父、アンテナ素子は通常の積
層基板を用いて構成している為、価格面、製造面におい
て大きなノリットを提供できる。(Effects of the Invention) The planar built-in antenna according to the present invention is small and has an extremely wide specific band, so it is a small-capacity, light-weight radio device that has a wide transmission and reception frequency interval and uses many channel frequencies, such as a portable radio telephone. It can be used as a built-in antenna for both transmission and reception. Since the antenna element is constructed using an ordinary multilayer substrate, it can offer a large margin in terms of price and manufacturing.
第１図は従来における逆Ｆ形アンテナの外観図、第２図
（ａ）は本発明の第１の実施例におけるアンテナの平面
図、第２図（ｂ）は本発明の第１の実施例におけるアン
テナの側面図、第３図（ａ）は本発明の第２の実施例に
おけるアンテナの平面図、第３図（ｂ）は本発明の第２
の実施例におけるアンテナの側面図、第４図（ａ）は本
発明の第１の実施例によるアンテナの特性図、第４図（
ｂ）は本発明の第２の実施例によるアンテナの特性図で
ある。
ｌ・・アンテナ素子、２・マツチング用ショート板、３
・・・給電点、４・・・アース基板、５ ・給電線、ｌ
ａ、ｌｂ・アンテナ素子１を構成する基板、２ａマツチ
ング用シヨート板２の立」−り部、２ｂマ、チング用シ
ョート板２のアンテナ素子１との接合部。
特許 出 願人 沖電気工業株式会社
第４図
（０）
一所安ｍ液ａ葦幅−！Ｕ Ｍ数
昭和 年 月 日
特許庁長官 殿
１ 事件の表示
昭和５８年 特 許 願第１８８４６４号２ 発明の名
称
携帯無線機内紙形広帯域小型アンテナ
３ 補正をする者
事件との関係 特許出願人
任 所（〒１０５） 東京都港区虎ノ門１丁目７番１２
号４代理人
住 所（〒１０５） 東京都港区虎ノ門１丁目７香１２
号２．−
るの’１ｉ７１ １０．１６ｄＢＪと補正する。FIG. 1 is an external view of a conventional inverted F-shaped antenna, FIG. 2(a) is a plan view of the antenna in the first embodiment of the present invention, and FIG. 2(b) is the first embodiment of the present invention. FIG. 3(a) is a plan view of the antenna according to the second embodiment of the present invention, and FIG. 3(b) is a side view of the antenna according to the second embodiment of the present invention.
FIG. 4(a) is a side view of the antenna according to the first embodiment of the present invention, and FIG. 4(a) is a characteristic diagram of the antenna according to the first embodiment of the present invention.
b) is a characteristic diagram of an antenna according to a second embodiment of the present invention. l...Antenna element, 2. Short plate for matching, 3
・・・Feeding point, 4... Earth board, 5 ・Feeding line, l
a, lb - Substrate constituting the antenna element 1, 2a the vertical part of the short plate 2 for matching, 2b ma, the joint part of the short plate 2 for matching with the antenna element 1; Patent Applicant: Oki Electric Industry Co., Ltd. Figure 4 (0) One place ammonium liquid a reed width -! UM Number Showa Year Month Date Commissioner of the Patent Office 1 Indication of the case 1988 Patent Application No. 188464 2 Name of the invention Paper-shaped wideband small antenna for portable wireless equipment 3 Relationship with the case of the person making the amendment Patent applicant Place (〒105) 1-7-12 Toranomon, Minato-ku, Tokyo
No. 4 Agent address (105) 1-7 Kaori, Toranomon, Minato-ku, Tokyo
No. 2. - Corrected to '1i71 10.16dBJ.
Claims (1)
導体を積層にして成る平板形状のアンテナ素子と、該ア
ンテナ素子と略平行に設けられる導体アース基板と、前
記アンテナ素子と接続される給電線と、前記アンテナ素
子の一端において両側面で異なる幅をもった貼り合わせ
面をなし、前記導体アース基板と間隙をあけて対向略平
行に固宥接続し前記給電線の特性インピーダンスと前記
アンテナのインピーダンスのマツチングをとるマツチン
グ用ンヨート板とから構成され、前記アンテナ素子の接
合端の反対端から該端部に隣シ合う両側面と前記反対端
に近い前記マツチングショート板の接合縁部との２つの
交点Ｐ、Ｑまでの長さのうち短い方の長さｔｌによって
所要周波数帯の高い方を決定し、長い方の長さｔ２によ
って所要周波数帯の低い方を決定し、更に前記給電線の
前記アンテナ素子との接続点である給電点から前記交点
Ｐ、Ｑまでの長さにおいて短かい方をｄｌ長い方をｄ２
とした場合に前記長さｔｌ とｔ２との量定することを
特徴とする携帯無線機内賦形広帯域小型アンテナ。A small broadband antenna built into a portable wireless device, comprising a flat antenna element formed by laminating a substrate and a conductor, a conductive earth substrate provided substantially parallel to the antenna element, and a feeder line connected to the antenna element. and a bonded surface having different widths on both sides at one end of the antenna element, and is firmly connected to the conductor ground board in a spaced manner and substantially parallel to each other, and the characteristic impedance of the feed line and the impedance of the antenna and a matching short plate for matching the antenna element, from the opposite end of the joint end of the antenna element to both side surfaces adjacent to the end, and the joint edge of the matching short board near the opposite end. The higher required frequency band is determined by the shorter length tl of the lengths to the two intersection points P and Q, and the lower required frequency band is determined by the longer length t2. In terms of the length from the feed point, which is the connection point with the antenna element, to the intersection points P and Q, the shorter one is dl, and the longer one is d2
1. A small wideband antenna embedded in a portable wireless device, characterized in that the lengths tl and t2 are determined when
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18846483A JPS6080302A (en) | 1983-10-11 | 1983-10-11 | Broad band small-sized antenna built in portable radio equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18846483A JPS6080302A (en) | 1983-10-11 | 1983-10-11 | Broad band small-sized antenna built in portable radio equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6080302A true JPS6080302A (en) | 1985-05-08 |
| JPH038603B2 JPH038603B2 (en) | 1991-02-06 |
Family
ID=16224167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18846483A Granted JPS6080302A (en) | 1983-10-11 | 1983-10-11 | Broad band small-sized antenna built in portable radio equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6080302A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0339628A2 (en) * | 1988-04-27 | 1989-11-02 | Motorola, Inc. | Detachable battery pack with a built-in broadband antenna |
| EP0339629A2 (en) * | 1988-04-27 | 1989-11-02 | Motorola, Inc. | Internally mounted broadband antenna |
-
1983
- 1983-10-11 JP JP18846483A patent/JPS6080302A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0339628A2 (en) * | 1988-04-27 | 1989-11-02 | Motorola, Inc. | Detachable battery pack with a built-in broadband antenna |
| EP0339629A2 (en) * | 1988-04-27 | 1989-11-02 | Motorola, Inc. | Internally mounted broadband antenna |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH038603B2 (en) | 1991-02-06 |
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