JPH0370401B2 - - Google Patents
Info
- Publication number
- JPH0370401B2 JPH0370401B2 JP29973987A JP29973987A JPH0370401B2 JP H0370401 B2 JPH0370401 B2 JP H0370401B2 JP 29973987 A JP29973987 A JP 29973987A JP 29973987 A JP29973987 A JP 29973987A JP H0370401 B2 JPH0370401 B2 JP H0370401B2
- Authority
- JP
- Japan
- Prior art keywords
- dielectric plate
- polarized wave
- divided
- circularly polarized
- wave generator
- 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
- 239000004020 conductor Substances 0.000 claims description 16
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
Landscapes
- Waveguide Switches, Polarizers, And Phase Shifters (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は高次モード波の共振現象を防止した簡
易な構成のマイクロ波帯用の円偏波発生器に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a circularly polarized wave generator for a microwave band, which has a simple configuration and prevents the resonance phenomenon of higher-order mode waves.
従来、この種の円偏波発生器として第３図に示
すようなものがある。１は円形導波管であり、そ
の内部に位相素子として誘電体板２を装荷してい
る。この誘電体板２には、３本の細長い導体線４
を並列させ、かつこれを管軸と平行方向に複数組
近接して配列している。
Conventionally, there is a circularly polarized wave generator of this type as shown in FIG. 1 is a circular waveguide, and a dielectric plate 2 is loaded therein as a phase element. This dielectric plate 2 has three elongated conductor wires 4.
are arranged in parallel, and a plurality of sets of these are arranged close to each other in a direction parallel to the tube axis.
この構成の円偏波発生器を、２つの周波数帯域
において共用する場合についてみる。即ち、低い
周波数帯域での下限周波数をfl1，上限周波数を
fl2，高い周波数帯域の下限周波数をfh1，上限周
波数をfh2とした場合、通常では電気的特性を良
好にするために、fh1，fh2は夫々円形導波管１に
おけるTM01及びTM11モード波の遮断波長より
僅か低い周波数に設定している。 Let us consider a case where a circularly polarized wave generator with this configuration is shared in two frequency bands. In other words, the lower limit frequency in the low frequency band is fl 1 and the upper limit frequency is
fl 2 , the lower limit frequency of the high frequency band is fh 1 and the upper limit frequency is fh 2. Normally, in order to improve the electrical characteristics, fh 1 and fh 2 are TM 01 and TM 01 in the circular waveguide 1, respectively. The frequency is set slightly lower than the cutoff wavelength of the TM 11 mode wave.
このような構成の円偏波発生器では、偏波Ｘに
おける基本モード及び高次モード波に対する遮断
周波数は偏波Ｙに対するそれよりも低くなる。し
たがつて、TM01及びTM11モード波の遮断周波
数が夫々fl2及びfh2よりも低くなると、この高次
モード波は円偏波発生器の軸長が高次モード波の
管内波長の1/2の整数倍となる周波数で共振現象
を生じ、円偏波発生器の特性を劣化させる。 In a circularly polarized wave generator having such a configuration, the cutoff frequency for the fundamental mode and higher-order mode waves in the polarized wave X is lower than that for the polarized wave Y. Therefore, when the cut-off frequencies of the TM 01 and TM 11 mode waves are lower than fl 2 and fh 2 , respectively, the higher-order mode waves are generated when the axial length of the circularly polarized wave generator is 1 part of the inner wavelength of the higher-order mode waves. A resonance phenomenon occurs at a frequency that is an integer multiple of /2, degrading the characteristics of the circularly polarized wave generator.
このため、第３図に示したように、従来では誘
電体板２上に３本の細長い導体線４を並列配置さ
せ、かつこれを管軸と平行方向に複数組配列し、
TM01及びTM11モード波の伝搬を阻止している。 For this reason, as shown in FIG. 3, in the past, three elongated conductor wires 4 were arranged in parallel on the dielectric plate 2, and a plurality of sets of these were arranged parallel to the tube axis.
Propagation of TM 01 and TM 11 mode waves is blocked.
上述した従来の円偏波発生器は、誘電体板上に
細長い導体線を所定の並列間隔でしかも所定の管
軸間隔に設定した上で形成して配列させているた
め、構造が複雑になるとともに、製造が困難にな
るという問題がある。
The conventional circularly polarized wave generator described above has a complicated structure because it is formed and arranged on a dielectric plate with long and thin conductor wires arranged at predetermined parallel intervals and at predetermined tube axis intervals. In addition, there is a problem that manufacturing becomes difficult.
本発明は、高次モードにおける共振を防止する
一方で、構造の簡易化を図つた円偏波発生器を提
供することを目的としている。 An object of the present invention is to provide a circularly polarized wave generator whose structure is simplified while preventing resonance in higher-order modes.
本発明の円偏波発生器は、円形導波管内部に位
相素子として装荷した誘電体板を管軸と垂直な面
で２分割し、分割した各誘電体板を分割面に差込
んだ管軸方向に細長い２本の導体棒で接続し、高
次モードにおける共振を防止し、かつ構造の簡易
化を図る構成としている。
In the circularly polarized wave generator of the present invention, a dielectric plate loaded as a phase element inside a circular waveguide is divided into two on a plane perpendicular to the tube axis, and each divided dielectric plate is inserted into the divided plane. They are connected by two axially elongated conductor rods to prevent resonance in higher-order modes and to simplify the structure.
次に、本発明を図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.
第１図は本発明による円偏波発生器の一実施例
の斜視図であり、第２図は第１図の誘電体板の詳
細図である。 FIG. 1 is a perspective view of an embodiment of a circularly polarized wave generator according to the present invention, and FIG. 2 is a detailed view of the dielectric plate of FIG. 1.
ここで、１は円形導波管、２は誘電体板、３は
導体棒である。誘電体板２はその長さl0及び厚さ
を使用周波数帯において所望の位相差が得られる
よう選ばれており、管軸に垂直な面で切断されて
長さl1とl2の２つの誘電体板２ａ，２ｂに２分割
されている。そして、各分割誘電体板２ａ，２ｂ
の分割面に管軸方向の穴を２つ開設し、これらの
穴内に夫々細長い２本の導体棒３を間隔Ｓを隔て
て管軸に平行に差込み、２分割された誘電体板２
ａ，２ｂはこの導体棒３を介して接合されてい
る。 Here, 1 is a circular waveguide, 2 is a dielectric plate, and 3 is a conductor bar. The dielectric plate 2 has a length l 0 and a thickness selected so as to obtain a desired phase difference in the frequency band used, and is cut in a plane perpendicular to the tube axis to have two lengths l 1 and l 2 . It is divided into two dielectric plates 2a and 2b. And each divided dielectric plate 2a, 2b
Two holes are made in the direction of the tube axis in the dividing plane, and two elongated conductor rods 3 are inserted into each of these holes parallel to the tube axis with a distance S between them, thereby dividing the dielectric plate 2 into two.
a and 2b are joined via this conductor rod 3.
ここで、導体棒３ははTM01及びTM11モード
波の管軸方向の電界が強い位置を選んでいる。ま
た、導体棒３の長さＬはは２つの周波数帯域で自
由空間波長1/2整数倍の長さにならないよう選び、
TEMモード波の発生量を小さくしている。 Here, the conductor rod 3 is selected at a position where the electric field of the TM 01 and TM 11 mode waves in the tube axis direction is strong. In addition, the length L of the conductor rod 3 is selected so that it is not an integral multiple of 1/2 the free space wavelength in the two frequency bands.
The amount of TEM mode waves generated is reduced.
したがつて、この構成によれば、２本の導体棒
３の位置と長さを適宜調整し、これを分割した誘
電体板２ａ，２ｂの各分割面に開けた穴内に挿入
させて両分割誘電体板を接続させるのみでよいた
め、構造は極めて単純化され、かつその製造も容
易なものとなる。 Therefore, according to this configuration, the positions and lengths of the two conductor rods 3 are adjusted appropriately, and the conductor rods 3 are inserted into holes made in each dividing surface of the divided dielectric plates 2a and 2b, thereby dividing the two conductor rods 3 into two parts. Since it is only necessary to connect the dielectric plates, the structure is extremely simple and manufacturing is easy.
以上説明したように本発明は、円形導波管内部
に位相素子として装荷した誘電体板を管軸と垂直
な面で２分割し、分割した各誘電体板を分割面に
差込んだ管軸方向に細長い２本の導体棒で接続し
ているので、高次モードにおける共振を防止し、
かつ構造の簡易化及び製造の容易化を達成できる
効果がある。
As explained above, the present invention has a dielectric plate loaded as a phase element inside a circular waveguide, which is divided into two on a plane perpendicular to the tube axis, and the tube axis in which each divided dielectric plate is inserted into the divided plane. Since it is connected by two conductor rods that are elongated in the direction, resonance in higher-order modes is prevented,
Moreover, it has the effect of simplifying the structure and facilitating manufacturing.
第１図は本発明による円偏波発生器の一実施例
の斜視図、第２図は誘電体板を分割した状態の斜
視図、第３図は従来の円偏波発生器の一部破断斜
視図である。
１…円形導波管、２…誘電体板、２ａ，２ｂ…
分割した誘電体板、３…導体棒、４…導体線。
Fig. 1 is a perspective view of an embodiment of a circularly polarized wave generator according to the present invention, Fig. 2 is a perspective view of a dielectric plate divided into parts, and Fig. 3 is a partially broken view of a conventional circularly polarized wave generator. FIG. 1...Circular waveguide, 2...Dielectric plate, 2a, 2b...
Divided dielectric plate, 3...conductor rod, 4...conductor wire.
Claims (1)
装荷したマイクロ波帯用の円偏波発生器におい
て、前記誘電体板を管軸と垂直な面で２分割し、
分割した各誘電体板を分割面に差込んだ管軸方向
に細長い２本の導体棒で接続したことを特徴とす
る円偏波発生器。1. In a microwave band circularly polarized wave generator in which a dielectric plate is loaded as a phase element inside a circular waveguide, the dielectric plate is divided into two along a plane perpendicular to the tube axis,
A circularly polarized wave generator characterized in that each divided dielectric plate is connected by two conductor rods that are elongated in the tube axis direction and inserted into the divided surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29973987A JPH01143401A (en) | 1987-11-30 | 1987-11-30 | Circularly polarized wave generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29973987A JPH01143401A (en) | 1987-11-30 | 1987-11-30 | Circularly polarized wave generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01143401A JPH01143401A (en) | 1989-06-06 |
| JPH0370401B2 true JPH0370401B2 (en) | 1991-11-07 |
Family
ID=17876380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29973987A Granted JPH01143401A (en) | 1987-11-30 | 1987-11-30 | Circularly polarized wave generator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01143401A (en) |
-
1987
- 1987-11-30 JP JP29973987A patent/JPH01143401A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01143401A (en) | 1989-06-06 |
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