JPH0326661Y2 - - Google Patents
Info
- Publication number
- JPH0326661Y2 JPH0326661Y2 JP1605783U JP1605783U JPH0326661Y2 JP H0326661 Y2 JPH0326661 Y2 JP H0326661Y2 JP 1605783 U JP1605783 U JP 1605783U JP 1605783 U JP1605783 U JP 1605783U JP H0326661 Y2 JPH0326661 Y2 JP H0326661Y2
- Authority
- JP
- Japan
- Prior art keywords
- radio wave
- end plate
- plate surface
- recesses
- antenna
- 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
Links
- 239000006096 absorbing agent Substances 0.000 claims description 20
- 239000000758 substrate Substances 0.000 claims description 5
- 239000004020 conductor Substances 0.000 claims description 3
- 238000002955 isolation Methods 0.000 description 20
- 238000005259 measurement Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000001228 spectrum Methods 0.000 description 6
- 230000010355 oscillation Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000005684 electric field Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Aerials With Secondary Devices (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Waveguide Aerials (AREA)
Description
【考案の詳細な説明】
この考案は受信用アンテナ部と送信用アンテナ
部を同一基台に取り付けた平面状の送受信用マイ
クロ波アンテナ対に関するものである。[Detailed Description of the Invention] This invention relates to a pair of planar transmitting and receiving microwave antennas in which a receiving antenna section and a transmitting antenna section are mounted on the same base.
送信用アンテナ部と受信用アンテナ部が同一基
台に取り付けられたこの種のマイクロ波アンテナ
は、例えば航空機の高度計として使用されてい
る。この種のマイクロ波アンテナにおいては送信
用アンテナ部と受信用アンテナ部間の電磁波の遮
蔽が充分でないと送信動作と受信動作を峻別して
行わせることができなくなり、動作不良状態にな
る。特にマイクロ波アンテナの送信系及び受信系
の利得が大きな場合には、この送信用アンテナ部
と受信用アンテナ部間の電磁波の遮蔽が充分であ
るか否かがアンテナ動作の重要な因子となる。通
常はマイクロ波アンテナの送信系から受信系まで
の総合利得Ａ（dB）と同程度以上のアンソレーシ
ヨンＳ（dB）が送信アンテナ部及び受信アンテナ
部間にあることがこの種のマイクロ波アンテナで
は設計上要求されている。 This type of microwave antenna, in which a transmitting antenna section and a receiving antenna section are mounted on the same base, is used, for example, as an altimeter for aircraft. In this type of microwave antenna, if the shielding of electromagnetic waves between the transmitting antenna section and the receiving antenna section is not sufficient, the transmitting operation and the receiving operation cannot be clearly distinguished, resulting in malfunction. Particularly when the gains of the transmitting system and the receiving system of the microwave antenna are large, whether the shielding of electromagnetic waves between the transmitting antenna section and the receiving antenna section is sufficient is an important factor in antenna operation. Usually, this type of microwave antenna has an unsolation S (dB) between the transmitting antenna section and the receiving antenna section that is equal to or more than the overall gain A (dB) from the transmitting system to the receiving system of the microwave antenna. This is required by design.
例えば送信用アンテナ部と受信用アンテナ部を
同一平面上に配設して送信系及び受信系を構成す
ると、相互間の距離が30cm以下ではアイソレーシ
ヨンＳは50〜60dBしか実現できない。このため
従来のこの種のアンテナにおいては第１図に示す
ように、送信用アンテナ１１と受信用アンテナ１
２間距離としては約60cm以上が要求される。従
つて送信用アンテナ１１と受信用アンテナ１２間
を60cm以上離して配設し、送信用アンテナ１１に
は同軸ケーブル１３の一端を、又受信用アンテナ
１２には同軸ケーブル１４の一端を接続し、それ
ぞれの同軸ケーブルの他端を送受信器１５の送信
端子tS及び受信端子tRにそれぞれ接続することが
必要である。このためにマイクロ波アンテナ全体
が大型化すると共に、配線に際して長い同軸ケー
ブルが必要であつて構造が複雑となる欠点を有し
ていた。 For example, if a transmitting antenna section and a receiving antenna section are disposed on the same plane to constitute a transmitting system and a receiving system, isolation S can only be achieved at 50 to 60 dB if the distance between them is 30 cm or less. Therefore, in the conventional antenna of this kind, as shown in FIG.
A distance of approximately 60 cm or more is required between the two. Therefore, the transmitting antenna 11 and the receiving antenna 12 are arranged with a distance of 60 cm or more, and one end of the coaxial cable 13 is connected to the transmitting antenna 11, and one end of the coaxial cable 14 is connected to the receiving antenna 12. It is necessary to connect the other ends of each coaxial cable to the transmit terminal t S and the receive terminal t R of the transceiver 15, respectively. For this reason, the entire microwave antenna becomes large in size, and a long coaxial cable is required for wiring, resulting in a complicated structure.
この考案はこの従来のこの種のマイクロ波アン
テナでの欠点を解決し、全体を大幅に小型化可能
にすると共に、送信系及び受信系の分離が完全に
行われ、高精度動作を行わせることができる送受
信マイクロ波アンテナ対を提供するものである。 This invention solves the drawbacks of this type of conventional microwave antenna, making it possible to significantly reduce the overall size, as well as completely separating the transmitting system and receiving system, allowing high-precision operation. The present invention provides a transmitting/receiving microwave antenna pair that is capable of transmitting and receiving microwave antennas.
この考案によると導電材の基台に第１、第２の
凹部が形成され、これらの凹部にそれぞれ第１、
第２のアンテナ素子が配設される。これらのアン
テナ素子はそれぞれ誘電体基板に対して中心に対
称に複数の板状放射素子が形成された構成とさ
れ、基台の第１、第２の凹部が形成される板面に
は第１、第２の凹部に挾まれて電波吸収体が取り
付けられている。 According to this invention, first and second recesses are formed in the base of the conductive material, and the first and second recesses are formed in these recesses, respectively.
A second antenna element is provided. Each of these antenna elements has a configuration in which a plurality of plate-shaped radiating elements are formed symmetrically with respect to the dielectric substrate. , a radio wave absorber is attached between the second recesses.
この考案においては使用電波波長をλ0、第１、
第２の凹部の互に対向する縁辺間距離をＬ、第１
及び第２の凹部の深さをＨ、電波吸収体の基台か
らの突出部分の高さをδ、電波吸収体の第１、第
２の凹部の配列方向の長さをＡとしてそれぞれが
以下のように設定される。 In this invention, the radio wave wavelength used is λ 0 , the first wavelength is λ 0 ,
The distance between the opposing edges of the second recess is L, and the distance between the opposing edges of the second recess is L,
and the depth of the second recess is H, the height of the protruding part from the base of the radio wave absorber is δ, and the length of the first and second recesses of the radio wave absorber in the arrangement direction is A, each of which is as follows. It is set as follows.
即ち3.1（λ0／２）＞Ｌ＞2.9（λ0／２），（0.6×
１／４λ0）＜
Ｈ＜1.0×１／４λ0，0.8mm＜δ＜1.5mm，1.2λ0＜Ａ＜
1.3λ0にそれぞれの値が設定され、且つ電波吸収
体の第１、第２の凹部の配列方向に直角な方向の
幅は電波吸収体の第１、第２の凹部の配列方向の
長さＡにほゞ等しく選定されている。 That is, 3.1(λ 0 /2)>L>2.9(λ 0 /2), (0.6×
1/4λ 0 ) < H < 1.0×1/4λ 0 , 0.8 mm < δ < 1.5 mm, 1.2 λ 0 < A < 1.3 λ 0 , and the first and second values of the radio wave absorber The width of the recesses in the direction perpendicular to the arrangement direction is selected to be approximately equal to the length A of the first and second recesses of the radio wave absorber in the arrangement direction.
以下、この考案の送受信用マイクロ波アンテナ
対をその実施例に基づき図面を使用して詳細に説
明する。 Hereinafter, the transmitting/receiving microwave antenna pair of this invention will be explained in detail based on its embodiments with reference to the drawings.
第２図及び第３図はこの考案の実施例の構成を
示し、Ａ材で基台２１が形成される。基台２１
は長手方向の両端側にほゞ正方形状の端板部２２
−１，２２−２が同一面上に形成される。これら
の端板部２２−１，２２−２に挾まれる基台２１
の中央部分が一体に屈曲され、この屈曲部分には
ほゞ正方形状に突出部２３が、端板部２２−１，
２２−２の形成されている面より突出するように
形成される。突出部２３の板面と端板部２２−
１，２２−２の板面とは互に平行に形成される。 FIGS. 2 and 3 show the structure of an embodiment of this invention, in which a base 21 is formed of A material. Base 21
There are approximately square end plate portions 22 on both ends in the longitudinal direction.
-1 and 22-2 are formed on the same surface. The base 21 is sandwiched between these end plate parts 22-1 and 22-2.
The central portion of the plate is bent integrally, and the bent portion has a substantially square protruding portion 23, and the end plate portions 22-1, 22-1,
It is formed so as to protrude from the surface where 22-2 is formed. The plate surface of the protruding portion 23 and the end plate portion 22-
The plate surfaces 1 and 22-2 are formed parallel to each other.
端板部２２−１，２２−２の両端は板面に直角
に屈曲され、突出部２３の板面位置まで延長され
て、突出部２３の板面の延長上に屈曲配設された
縁辺２４−１，２４−２が形成される。即ち導電
材の基台２１に第１、第２の凹部２１−Ｈ１，２
１−Ｈ２が形成されることになる。 Both ends of the end plate portions 22 - 1 and 22 - 2 are bent at right angles to the plate surface, and are extended to the plate surface position of the protrusion 23 to form an edge 24 that is bent and disposed on an extension of the plate surface of the protrusion 23 . -1, 24-2 are formed. That is, the first and second recesses 21-H1, 2 are formed in the base 21 of the conductive material.
1-H2 will be formed.
基台２１の両端側の端板部２２−１，２２−２
の突出部２３側の板面、即ち第１、第２の凹部２
１−Ｈ１，２１−Ｈ２の板面上に第１、第２のア
ンテナ素子２６−１，２６−２が固定配設され
る。 End plate parts 22-1, 22-2 on both end sides of the base 21
The plate surface on the protrusion 23 side, that is, the first and second recesses 2
First and second antenna elements 26-1 and 26-2 are fixedly arranged on the plate surfaces of 1-H1 and 21-H2.
第１、第２のアンテナ素子２６−１，２６−２
は同一形状とされ、第４図に第１のアンテナ素子
２６−１について示すように比誘電率εが2.5〜
2.6のテフロン登録商標系材で形成された、例え
ば一辺が86mmで厚みが1.6mmの正方形板状の基板
２７−１上に一辺が19.75mmの正方形状の放射素
子２８−１１〜２８−１４が中心に対称に例えば
印刷の手段で形成されている。 First and second antenna elements 26-1, 26-2
have the same shape, and have a relative permittivity ε of 2.5 to 2.5, as shown for the first antenna element 26-1 in FIG.
Square-shaped radiating elements 28-11 to 28-14 each having a side of 19.75 mm are mounted on a square plate-shaped substrate 27-1, for example, having a side of 86 mm and a thickness of 1.6 mm. It is formed symmetrically around the center, for example, by printing means.
図示していないがそれぞれの放射素子２８−１
１〜２８−１４及び２８−２１〜２８−２４に対
するフイードラインが基板２７−１，２７−２に
形成され、このフイードラインの給電点に対して
同軸ケーブルを接続するための同軸ケーブル接続
部３１−１，３１−２が端板部２２−１，２２−
２の板面を貫通して取り付け可能な構造となつて
いる。それぞれの放射素子２８−１１〜２８−１
４，２８−２１〜２８−２４に対するフイードラ
インの給電点からの全長を所定値に設定すること
により、各放射素子における励起位相を同一化し
或は所定位相に設定して所望の特性を得ることが
できる。 Although not shown, each radiating element 28-1
Feed lines for 1 to 28-14 and 28-21 to 28-24 are formed on the substrates 27-1 and 27-2, and a coaxial cable connection part 31-1 for connecting a coaxial cable to the feeding point of this feed line. , 31-2 are the end plate portions 22-1, 22-
It has a structure that allows it to be attached by penetrating the plate surface of 2. Each radiating element 28-11 to 28-1
By setting the total length from the feeding point of the feed lines for 4, 28-21 to 28-24 to a predetermined value, the excitation phase in each radiating element can be made the same or set to a predetermined phase to obtain desired characteristics. can.
基台２１の突出部２３の板面に対して86mm×86
mmのフエライト材の電波吸収体２５がその縁辺を
基台２１の長手方向に沿わせるようにして取り付
けられる。実施例においては突出部２３に電波吸
収体２５が嵌合される浅い溝孔が形成され、この
溝孔内に電波吸収体２５が固定して取り付けられ
る。電波吸収体２５は突出部２３の板面から所定
の長さδmmだけ突出して配設される。 86mm x 86mm to the plate surface of the protrusion 23 of the base 21
A radio wave absorber 25 made of a ferrite material having a diameter of 1 mm is attached so that its edge runs along the longitudinal direction of the base 21. In the embodiment, a shallow slot into which the radio wave absorber 25 is fitted is formed in the protrusion 23, and the radio wave absorber 25 is fixedly attached within this slot. The radio wave absorber 25 is arranged to protrude from the plate surface of the protrusion 23 by a predetermined length δmm.
考案者等はこのような構成の送受信用マイクロ
波アンテナ対に対して、突出部２３の基台２１の
長手方向の長さ、即ち第１、第２の凹部２１−Ｈ
１，２１−Ｈ２の互に対向する縁辺距離Ｌ、突出
部２３と端板部２２−１，２２−２間の板面間距
離、即ち第１、第２の凹部２１−Ｈ１，２１−Ｈ
２の深さＨ、及び電波吸収体２５の基台２１の板
面からの突出部分の高さδについて実験を重ね、
この考案の構成条件を設定した。なおこの考案の
送受信用マイクロ波アンテナ対としては周波数範
囲4250MHz〜4350MHz程度の使用周波数領域で特
性が満足すれば充分である。 For a pair of transmitting/receiving microwave antennas having such a configuration, the inventors have determined that the length of the protrusion 23 in the longitudinal direction of the base 21, that is, the first and second recesses 21-H
1 and 21-H2, the distance between the opposing edges L, and the distance between the plate surfaces between the protruding portion 23 and the end plate portions 22-1 and 22-2, that is, the first and second recessed portions 21-H1, 21-H.
2, and the height δ of the protruding portion of the radio wave absorber 25 from the plate surface of the base 21.
The structural conditions for this idea were set. It should be noted that it is sufficient for the transmitting/receiving microwave antenna pair of this invention to satisfy the characteristics in the operating frequency range of about 4250 MHz to 4350 MHz.
この考案においては送信用アンテナ部と受信用
アンテナ部間の電磁波の遮蔽特性が最適の条件を
見出す構成を得るために、各設定因子に対してア
イソレーシヨン特性を測定して最大のアイソレー
シヨン特性が得られるものを求める必要がある。 In this invention, in order to obtain a configuration that finds the optimum electromagnetic wave shielding characteristics between the transmitting antenna section and the receiving antenna section, the isolation characteristics are measured for each setting factor and the maximum isolation is achieved. It is necessary to look for something that provides the characteristics.
この場合に使用したアイソレーシヨン測定系は
第６図に示すような構成のものである。即ちマイ
クロ波発振器３１の出力端子t1とスペクトルアナ
ライザ３２の入力端子t2とを直接接続し、マイク
ロ波発振器３１の周波数4250〜4350MHzの領域で
の出力信号レベルをスペクトラムアナライザ３２
でモニタし、記録可能にする。 The isolation measurement system used in this case has a configuration as shown in FIG. That is, the output terminal t 1 of the microwave oscillator 31 and the input terminal t 2 of the spectrum analyzer 32 are directly connected, and the output signal level of the microwave oscillator 31 in the frequency range of 4250 to 4350 MHz is measured by the spectrum analyzer 32.
to monitor and record.
一方、この考案のマイクロ波アンテナ１０をア
ンテナ素子２６−１，２６−２の板面を水平に保
持した状態でマイクロ波発振器３１とスペクトラ
ムアナライザ３２の近傍に配設する。測定に際し
てはケーブルW1及びW2によりそれぞれマイクロ
波発振器３１の出力端子t1と、マイクロ波アンテ
ナ１０の送信用アンテナ部の同軸ケーブル接続部
３１−２間及びスペクトラムアナライザ３２の入
力端子t2と、マイクロ波アンテナ１０の受信用ア
ンテナ部の同軸ケーブル接続部３１−１間が接続
される。 On the other hand, the microwave antenna 10 of this invention is placed near the microwave oscillator 31 and the spectrum analyzer 32 with the plate surfaces of the antenna elements 26-1 and 26-2 held horizontally. During measurement, cables W 1 and W 2 are used to connect the output terminal t 1 of the microwave oscillator 31 to the coaxial cable connection 31 - 2 of the transmitting antenna section of the microwave antenna 10 and the input terminal t 2 of the spectrum analyzer 32, respectively. , and the coaxial cable connection section 31-1 of the reception antenna section of the microwave antenna 10 are connected.
このような測定系においてマイクロ波発振器３
１の出力端子t1からの出力信号はマイクロ波アン
テナ１０の送信用アンテナ部を介し、この送信用
アンテナ部から自由空間に放出される。マイクロ
波アンテナ１０の遮蔽特性が優れていて、送信用
アンテナ部から受信用アンテナ部への信号の漏洩
がなければ、ケーブルW2を通してスペクトラム
アナライザ３２の入力端子に漏洩信号が送り込ま
れることはない。 In such a measurement system, the microwave oscillator 3
The output signal from the output terminal t 1 of the microwave antenna 10 is emitted from the transmitting antenna section into free space via the transmitting antenna section of the microwave antenna 10 . If the shielding characteristics of the microwave antenna 10 are excellent and there is no signal leakage from the transmitting antenna section to the receiving antenna section, no leaked signal will be sent to the input terminal of the spectrum analyzer 32 through the cable W2 .
従つてマイクロ波発振器３１の出力端子t1から
送信用アンテナ部に入力される信号レベルをP1
（watt）、受信用アンテナ部からケーブルW2を通
してスペクトラムアナライザ３２の入力端子に与
えられる信号レベルをP2（watt）として、アイソ
レーシヨンは１０Iog10P1／P2（dB）で与えられる。 Therefore, the signal level input from the output terminal t 1 of the microwave oscillator 31 to the transmitting antenna section is P 1
(watt), and the signal level given to the input terminal of the spectrum analyzer 32 from the receiving antenna section through the cable W2 is P2 ( watt ), and the isolation is given as 10Iog10P1 / P2 (dB).
信号自体のレベルがP0（watt）＝1000×P0（mw）
の時、この信号を１０Iog10（1000P0）dBmと呼
び、信号レベルを電圧で表示した場合にはV0
（ｖ）＝106×V0（μv）であるから、20Iog（106×
V0）dBμVと呼び、通常アンテナなどの電界強度
表現においてはμVを省略して単にdBと呼ぶこと
が多い。この場合1mwを0dB、1μVを0dBμVと
定める。 The level of the signal itself is P 0 (watt) = 1000×P 0 (mw)
, this signal is called 10Iog 10 (1000P 0 ) dBm, and when the signal level is expressed in voltage, it is V 0
(v)=10 6 ×V 0 (μv), so 20Iog(10 6 ×
V 0 ) dBμV, and when expressing the electric field strength of an antenna, μV is often omitted and simply called dB. In this case, 1mw is defined as 0dB, and 1μV is defined as 0dBμV.
すでに述べたように電波吸収体２５を基台２１
の中央の突出部２３に、又第１、第２のアンテナ
素子２６−１，２６−２を第１、第２の凹部２１
−Ｈ１，２１−Ｈ２の端板部２２−１，２２−２
に取り付けたマイクロ波アンテナについて、最初
に突出部２３の基台２１の長手方向の長さＬの範
囲を設定する。このために自由空間波長λ0として
Ｌを３／２λ0を中心にして±１／４λ0の範囲で変化さ
せ
た。この場合に横軸にＬをとり、縦軸にアイソレ
ーシヨンＳをとると第７図に示すような測定結果
が得られた。第７図に示す実験結果は、マイクロ
波発振器３１の発振周波数を4300MHzに設定した
ものである。第７図の実験結果によりＬ＝３／２λ0
にアイソレーシヨンの極大値が存在することが確
認されるので、以後基本的にはＬ＝３／２λ0の条件
で他の実験を進める。 As already mentioned, the radio wave absorber 25 is mounted on the base 21.
The first and second antenna elements 26-1 and 26-2 are placed in the central protrusion 23 of the first and second recesses 21.
-H1, 21-H2 end plate parts 22-1, 22-2
Regarding the microwave antenna attached to the microwave antenna, first, the range of length L in the longitudinal direction of the base 21 of the protrusion 23 is set. For this purpose, L was varied within the range of ±1/4λ 0 with the free space wavelength λ 0 centered around 3/2λ 0 . In this case, when L is plotted on the horizontal axis and isolation S is plotted on the vertical axis, measurement results as shown in FIG. 7 are obtained. The experimental results shown in FIG. 7 were obtained by setting the oscillation frequency of the microwave oscillator 31 to 4300 MHz. Since the experimental results shown in FIG. 7 confirm that the maximum value of isolation exists at L=3/2λ 0 , other experiments will basically be carried out under the condition of L=3/2λ 0 .
Ｌについては3.1（λ0／２）＞Ｌ＞2.9（λ0／２）の
範囲
で80dB以上のアイソレーシヨンを得ることがで
きた。 Regarding L, isolation of 80 dB or more could be obtained in the range of 3.1 (λ 0 /2)>L>2.9 (λ 0 /2).
次にＬをこの条件でＬ＝３／２λ0に保持して、端
板部と突出部の板面間距離Ｈを０〜１／４λ0の範囲
で変化させ、アイソレーシヨンＳを各Ｈについて
測定すると第８図に示す結果が得られ、0.6×１／４
λ0＜Ｈ＜1.0×１／４λ0の条件が得られた。この場合
もマイクロ発振器３１の発振周波数は4300MHzに
設定して実験を行つた。 Next, while maintaining L at L = 3/2λ 0 under these conditions, the distance H between the plate surfaces of the end plate and the protruding portion is varied in the range of 0 to 1/4λ 0 , and the isolation S is adjusted for each H. When measured, the results shown in FIG. 8 were obtained, and the condition of 0.6×1/4 λ 0 <H<1.0×1/4 λ 0 was obtained. In this case as well, the experiment was conducted with the oscillation frequency of the micro oscillator 31 set to 4300 MHz.
Ｌ＝３／２λ0，Ｈ＝0.8１／４λ0なる設定条件を保
持
した状態で電波吸収体２５の突出部２３の板面か
らの突出高さδを変化させて、それぞれ対応する
アイソレーシヨンＳを測定して第９図に示す結果
を得た。第９図の結果より0.8＜δ＜1.5（mm）の
範囲において、第１及び第２のアンテナ素子２６
−１，２６−２間でのアイソレーシヨンＳを
80dB以上にすることが可能であることが確認さ
れた。第９図に示す測定に際しても、マイクロ波
発振器３１の発振周波数は4300MHzに設定した。 While maintaining the setting conditions of L = 3/2λ 0 and H = 0.81/4λ 0 , the protrusion height δ of the protrusion 23 of the radio wave absorber 25 from the plate surface is changed to obtain the corresponding isolation. S was measured and the results shown in FIG. 9 were obtained. From the results shown in FIG. 9, in the range of 0.8<δ<1.5 (mm), the first and second antenna elements 26
-1,26-2 isolation S
It was confirmed that it is possible to increase the level to 80dB or more. Also in the measurement shown in FIG. 9, the oscillation frequency of the microwave oscillator 31 was set to 4300 MHz.
なお、電波吸収体２５の形状については一辺が
86mmの正方形状の他、二辺がそれぞれ86mm及び60
mmの長方形状のものについても良好なアイソレー
シヨン特性を得ることができた。δ＝0.8mm，Ｌ
＝３／２λ0，Ｈ＝0.8１／４λ0，Ａ＝86mmの条件下で
マ
イクロ波発振器３１の発振周波数を4300MHzに保
持して、Ｂを変化させて対応するアイソレーシヨ
ンＳを測定した結果を第１０図に示す。 In addition, regarding the shape of the radio wave absorber 25, one side is
In addition to the 86mm square shape, the two sides are 86mm and 60mm respectively.
Good isolation characteristics were also obtained for the rectangular shape of mm. δ=0.8mm, L
= 3/2λ 0 , H = 0.81/4λ 0 , A = 86mm, the oscillation frequency of the microwave oscillator 31 was held at 4300MHz, B was varied, and the corresponding isolation S was measured. is shown in Figure 10.
第５図は以上の個々の因子に対して得られた結
果に基づき、Ｌ＝３／２λ0，Ｈ＝0.8１／４λ0，Ａ＝
Ｂ
＝86mmの条件下で、マイクロ波発振器３１の発振
周波数ｆに対して考案者等が行つたアイソレーシ
ヨンＳの測定結果であり、曲線Ａはδ＝1.0mmに
設定した場合、曲線Ｂはδ＝0.3mmに設定した場
合である。 Figure 5 is based on the results obtained for the above individual factors, L=3/2λ 0 , H=0.81/4λ 0 , A=
These are the results of measurements of isolation S conducted by the inventors with respect to the oscillation frequency f of the microwave oscillator 31 under the condition of B = 86 mm. When curve A is set to δ = 1.0 mm, curve B is This is the case where δ is set to 0.3 mm.
このように本願考案によるとアンテナ指向特性
に影響を及ぼすことなく、小型化され同軸ケーブ
ルを長く配設する必要がなく、送信用アンテナ部
と受信用アンテナ部間で充分なアイソレーシヨン
を得ることが可能となる。同軸ケーブルの配設距
離も大幅に短縮化されるので、伝送損失も減少さ
せることが可能である。 As described above, the invention of the present invention is made compact and does not require long coaxial cables without affecting the antenna directivity characteristics, and sufficient isolation can be obtained between the transmitting antenna section and the receiving antenna section. becomes possible. Since the installation distance of the coaxial cable is also significantly shortened, transmission loss can also be reduced.
以上詳細に説明したように、この考案によると
高感度動作が可能で全体が大幅に小型化され、伝
送損失も少なく、高出力信号の送信及び受信が可
能な送受信用マイクロ波アンテナ対を提供するこ
とができる。 As explained in detail above, this invention provides a pair of transmitting/receiving microwave antennas that are capable of highly sensitive operation, are significantly miniaturized, have little transmission loss, and are capable of transmitting and receiving high-output signals. be able to.
第１図は従来のマイクロ波アンテナの構成を示
すブロツク図、第２図はこの考案の送受信用マイ
クロ波アンテナ対の実施例の構成を示す平面図、
第３図は第２図のＫ−Ｋ断面図、第４図はこの考
案の送受信用マイクロ波アンテナ対の実施例に用
いるアンテナ素子の構成を示す斜視図、第５図は
この考案の送受信用マイクロ波アンテナ対の実施
例で得られたアイソレーシヨン特性図、第６図は
この考案におけるアイソレーシヨン測定系の構成
を示す図、第７図はこの考案の送受信用マイクロ
波アンテナ対の実施例での第１、第２の凹部の対
向縁辺間距離ＬとアイソレーシヨンＳの関係を示
す図、第８図はこの考案の送受信用マイクロ波ア
ンテナ対の実施例での第１、第２の凹部の深さＨ
とアイソレーシヨンＳの関係を示す図、第９図は
この考案の送受信用マイクロ波アンテナ対の実施
例での電波吸収体の基台からの突出高δとアイソ
レーシヨンＳの関係を示す図、第１０図はこの考
案の送受信用マイクロ波アンテナ対の実施例での
電波吸収体の形状とアイソレーシヨンの関係を示
す図である。
２１……基台、２２−１，２２−２……端板
部、２３……突出部、２５……電波吸収体、２６
−１，２６−２……アンテナ素子、２７−１，２
７−２……基板、２８−１１〜２８−１４，２８
−２１〜２８−２４……放射素子、３１−１，３
１−２……同軸ケーブル。
FIG. 1 is a block diagram showing the configuration of a conventional microwave antenna, and FIG. 2 is a plan view showing the configuration of an embodiment of the transmitting/receiving microwave antenna pair of this invention.
3 is a sectional view taken along the line KK in FIG. 2, FIG. 4 is a perspective view showing the structure of an antenna element used in an embodiment of the transmitting/receiving microwave antenna pair of this invention, and FIG. 5 is a sectional view of the transmitting/receiving microwave antenna of this invention Isolation characteristic diagram obtained in the example of the microwave antenna pair, Figure 6 is a diagram showing the configuration of the isolation measurement system in this invention, and Figure 7 is the implementation of the microwave antenna pair for transmission and reception of this invention. FIG. 8 is a diagram showing the relationship between the distance L between the opposing edges of the first and second recesses and the isolation S in the example, and FIG. Depth of recess H
FIG. 9 is a diagram showing the relationship between the protrusion height δ of the radio wave absorber from the base and the isolation S in an embodiment of the transmitting/receiving microwave antenna pair of this invention. FIG. 10 is a diagram showing the relationship between the shape of the radio wave absorber and the isolation in an embodiment of the transmitting/receiving microwave antenna pair of this invention. 21...Base, 22-1, 22-2...End plate part, 23...Protrusion part, 25...Radio wave absorber, 26
-1,26-2...Antenna element, 27-1,2
7-2...Substrate, 28-11 to 28-14, 28
-21 to 28-24...radiating element, 31-1, 3
1-2...Coaxial cable.
Claims (1)
ほゞ正方形状の第１、第２の端板部が同一面上に
形成され、これら第１、第２端板部に挾まれる前
記基台の中央部が一体に屈曲され、この屈曲部分
にはほゞ正方形状の突出部の板面が前記第１、第
２の端板部の板面と平行に突出形成され、前記第
１、第２の端板部の両端は前記突出部の板面の位
置まで直角に屈曲延長され、その板面の延長上に
それぞれ屈曲配設されて第１、第２の縁辺が形成
され、これら第１、第２の縁辺と前記突出部とに
囲まれてそれぞれ前記第１、第２の端板部面上に
第１、第２の凹部が形成され、これら第１、第２
の凹部の板面上にそれぞれ正方形状の誘電体基板
の中心に対称に複数の板状放射素子が形成された
第１、第２のアンテナ素子が配設され、前記突出
部の板面の中央には電波吸収体がその縁辺を前記
基台の長手方向に沿わせるように取り付けられ、
使用電波波長をλ0、前記第１、第２の凹部の互に
対向する縁辺間距離Ｌが3.1（λ0／２）＞λ＞2.9 （λ0／２）、前記第１及び第２の凹部の深さＨが0.6× １／４λ0＜Ｈ＜1.0×１／４λ0、前記電波吸収体の前
記 突出部板面からの突出部分の高さδが0.8mm＜δ
＜1.5mm、前記電波吸収体の前記第１、第２の凹
部の配列方向の長さＡが1.2λ0＜Ａ＜1.3λ0で、こ
の長さ方向に直角な前記電波吸収体の幅Ｂが前記
長さＡにほゞ等しく選定されてなることを特徴と
する送受信用マイクロ波アンテナ対。[Claims for Utility Model Registration] Approximately square-shaped first and second end plate portions are formed on the same plane at both ends in the longitudinal direction of a base made of a conductive material, and these first and second end plate portions are formed on the same plane. The center portion of the base that is sandwiched between the plate portions is bent integrally, and the plate surface of the approximately square-shaped protrusion is parallel to the plate surfaces of the first and second end plate portions at this bent portion. The first and second end plate portions are formed in a protruding manner, and both ends of the first and second end plate portions are bent and extended at right angles to the position of the plate surface of the protruding portion, and the first and second end plate portions are respectively bent and arranged on the extension of the plate surface. first and second recesses are formed on the first and second end plate surfaces, respectively, surrounded by the first and second edges and the protrusion; 1. 2nd
First and second antenna elements each having a plurality of plate-shaped radiating elements formed symmetrically around the center of a square dielectric substrate are disposed on the plate surface of the concave portion, and the center of the plate surface of the protruding portion is disposed on the plate surface of the concave portion. A radio wave absorber is attached to the base so that its edge runs along the longitudinal direction of the base,
The used radio wave wavelength is λ 0 , the distance L between the opposing edges of the first and second recesses is 3.1 (λ 0 /2)>λ>2.9 (λ 0 /2), and the first and second recesses are The depth H of the recess is 0.6×1/4λ 0 <H<1.0×1/4λ 0 , and the height δ of the protruding portion of the radio wave absorber from the plate surface of the protruding portion is 0.8 mm<δ
<1.5 mm, the length A in the arrangement direction of the first and second recesses of the radio wave absorber is 1.2λ 0 <A<1.3λ 0 , and the width B of the radio wave absorber perpendicular to this length direction A pair of microwave antennas for transmitting and receiving, characterized in that the length A is selected to be approximately equal to the length A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1605783U JPS59125110U (en) | 1983-02-04 | 1983-02-04 | Microwave antenna pair for transmission and reception |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1605783U JPS59125110U (en) | 1983-02-04 | 1983-02-04 | Microwave antenna pair for transmission and reception |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59125110U JPS59125110U (en) | 1984-08-23 |
| JPH0326661Y2 true JPH0326661Y2 (en) | 1991-06-10 |
Family
ID=30147359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1605783U Granted JPS59125110U (en) | 1983-02-04 | 1983-02-04 | Microwave antenna pair for transmission and reception |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59125110U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003287568A (en) * | 2002-03-28 | 2003-10-10 | Denso Corp | Radar apparatus, and radome |
| JP3870958B2 (en) * | 2004-06-25 | 2007-01-24 | ソニー株式会社 | ANTENNA DEVICE AND RADIO COMMUNICATION DEVICE |
-
1983
- 1983-02-04 JP JP1605783U patent/JPS59125110U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59125110U (en) | 1984-08-23 |
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