JPS6258564B2 - - Google Patents
Info
- Publication number
- JPS6258564B2 JPS6258564B2 JP56053515A JP5351581A JPS6258564B2 JP S6258564 B2 JPS6258564 B2 JP S6258564B2 JP 56053515 A JP56053515 A JP 56053515A JP 5351581 A JP5351581 A JP 5351581A JP S6258564 B2 JPS6258564 B2 JP S6258564B2
- Authority
- JP
- Japan
- Prior art keywords
- modulation
- waveguide
- millimeter wave
- oscillator
- radiator
- 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
- 238000000034 method Methods 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 7
- 230000005855 radiation Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000010355 oscillation Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000003989 dielectric material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C7/00—Modulating electromagnetic waves
- H03C7/02—Modulating electromagnetic waves in transmission lines, waveguides, cavity resonators or radiation fields of antennas
- H03C7/025—Modulating electromagnetic waves in transmission lines, waveguides, cavity resonators or radiation fields of antennas using semiconductor devices
- H03C7/027—Modulating electromagnetic waves in transmission lines, waveguides, cavity resonators or radiation fields of antennas using semiconductor devices using diodes
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
- Transmitters (AREA)
- Radio Transmission System (AREA)
Description
【発明の詳細な説明】
本発明は、ミリ波帯のAM変調波を送信する方
式に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for transmitting AM modulated waves in the millimeter wave band.
従来、ミリ波帯でAM変調波を発生する方式と
して、第一に発振用能動素子に加える電力を変化
させる方式、および第二に発振器の出力部に可変
減衰回路を備え、その可変減衰回路に加える電力
を変化させる方式が提案されている。しかしなが
ら、第一の方式では発振用能動素子の動作点が変
化するために発振振幅のみでなく、発振周波数も
変化するので出力波はFM変調をも含むAM波と
なるという欠点がある。また第二の方式ではミリ
波帯ではごくわずかな分布容量でも信号が伝送さ
れてしまうので、十分大きな減衰量を与える可変
減衰回路を実現することが困難であるという欠点
がある。したがつて、ミリ波帯の信号伝送用変調
としては普通AM以外のFM、またはPMが使用さ
れていた。 Conventionally, as methods for generating AM modulated waves in the millimeter wave band, the first method is to vary the power applied to the oscillation active element, and the second method is to equip the output section of the oscillator with a variable attenuation circuit. A method has been proposed in which the applied power is varied. However, the first method has the drawback that not only the oscillation amplitude but also the oscillation frequency changes because the operating point of the oscillation active element changes, so the output wave becomes an AM wave including FM modulation. Furthermore, in the second method, signals are transmitted even with a very small distributed capacitance in the millimeter wave band, so there is a drawback that it is difficult to realize a variable attenuation circuit that provides a sufficiently large amount of attenuation. Therefore, FM or PM other than AM has usually been used as modulation for signal transmission in the millimeter wave band.
ところで、受信設備に関して考えると、AM波
の復調は、検波器を用意すればすむのと比較して
FM波の復調にはFMデイスクリミネータが実現
し得る周波数帯まで、周波数を下げるための局部
発振器、およびミクサーが必要であり、その設備
が複雑かつ高価になつてしまう。 By the way, when considering receiving equipment, demodulating AM waves is easier than just preparing a detector.
Demodulating FM waves requires a local oscillator and a mixer to lower the frequency to a frequency band that can be realized by an FM discriminator, making the equipment complex and expensive.
本発明の目的は、簡単な構成でミリ波帯のAM
変調波を送信することのできる方式を提供するこ
とである。上記目的を達成するために、本発明に
よる方式はミリ波信号発振器と、前記発振器から
の信号出力を放射する輻射器と、前記輻射器に近
接配置され所定の輻射パターンを生ずる導波器
と、前記導波器に接続され変調信号が加えられる
可変インピーダンス素子と、前記導波器から所定
距離に配置され、輻射電力の一部を受けて検波す
る検波素子とを備え、前記検波素子による検波出
力を増幅し、変調信号とともに前記インピーダン
ス素子に加えるように構成したものである。 The purpose of the present invention is to provide AM in the millimeter wave band with a simple configuration.
It is an object of the present invention to provide a method capable of transmitting modulated waves. In order to achieve the above object, the system according to the present invention includes a millimeter wave signal oscillator, a radiator that radiates the signal output from the oscillator, and a waveguide that is placed close to the radiator and produces a predetermined radiation pattern. A variable impedance element connected to the waveguide and to which a modulation signal is applied, and a detection element disposed at a predetermined distance from the waveguide and detecting a part of the radiated power, the detection output by the detection element is amplified and applied to the impedance element together with the modulation signal.
これによりミリ波帯のAM変調送信を簡単、か
つ安価に行なうことができる。 This allows AM modulation transmission in the millimeter wave band to be performed easily and at low cost.
以下、図面を参照して、本発明による方式をさ
らに詳細に説明する。 Hereinafter, the system according to the present invention will be explained in more detail with reference to the drawings.
第１図は本発明によるAM変調方式の一実施例
を示す図である。図において、１は発振器の出力
を電波として放射するための輻射器、２は輻射パ
ターンを得るための導波器、３は輻射電力を検出
するため、その一部の電力を検出するアンテナで
あり、金属スタツド、プリント板のパターン、誘
電体などで構成される。輻射器１にはミリ波の発
振器４が接続され、その出力は輻射器１を通じて
電波として放射される。導波器２にはAM変調用
可変インピーダンス素子としてダイオード５が接
続される。ダイオード入力端子９へ印加される変
調信号電圧により、ダイオード５のインピーダン
スが変化するので、導波器として動作が変化させ
られて輻射パターンが変化し、放射電力を測定す
ると、AM変調波が観測される。アンテナ３には
検波器６が接続され、検波器６でAM変調波が再
生されて帰還増幅器７により増幅され、変調用ダ
イオード５に帰還される。この帰還により、AM
変調の歪が補正される。変調信号は変調信号入力
端子８から入力され、変調ダイオード入力端子９
を通つて、変調用ダイオード５に加えられAM変
調がなされる。 FIG. 1 is a diagram showing an embodiment of the AM modulation method according to the present invention. In the figure, 1 is a radiator for radiating the output of the oscillator as radio waves, 2 is a waveguide for obtaining a radiation pattern, and 3 is an antenna for detecting a part of the radiated power. It consists of metal studs, printed circuit board patterns, dielectric materials, etc. A millimeter wave oscillator 4 is connected to the radiator 1, and its output is radiated through the radiator 1 as radio waves. A diode 5 is connected to the waveguide 2 as a variable impedance element for AM modulation. The impedance of the diode 5 changes due to the modulation signal voltage applied to the diode input terminal 9, so its operation as a waveguide changes and the radiation pattern changes. When the radiated power is measured, an AM modulated wave is observed. Ru. A detector 6 is connected to the antenna 3, and the AM modulated wave is regenerated by the detector 6, amplified by a feedback amplifier 7, and fed back to the modulation diode 5. With this return, AM
Modulation distortion is corrected. The modulation signal is input from the modulation signal input terminal 8, and the modulation signal is input from the modulation diode input terminal 9.
AM modulation is performed through the modulation diode 5.
本発明によるAM変調方式は以上のように構成
されているから、簡単な構成で歪の少ないAM変
調波が得られる。また、検波器出力端子１０をモ
ニターすることにより、変調回路が正常か否かの
判定も容易に行なうことができる。なお、前記実
施例では変調信号入力端子８から入力している
が、ダイオード入力端子９から入力してもよい。 Since the AM modulation method according to the present invention is configured as described above, an AM modulated wave with little distortion can be obtained with a simple configuration. Furthermore, by monitoring the detector output terminal 10, it is possible to easily determine whether the modulation circuit is normal or not. In the above embodiment, the modulation signal is input from the modulation signal input terminal 8, but it may be input from the diode input terminal 9.
第１図は本発明の一実施例を示す構成図であ
る。
１……輻射器、２……導波器、３……電力検出
用アンテナ、４……ミリ波帯信号発振器、５……
変調用ダイオード、６……検波器、７……帰還用
増幅器、８……変調信号入力端子、９……変調用
ダイオード入力端子、１０……検波器出力端子。
FIG. 1 is a block diagram showing an embodiment of the present invention. 1... Radiator, 2... Wave director, 3... Power detection antenna, 4... Millimeter wave band signal oscillator, 5...
Modulation diode, 6...Detector, 7...Feedback amplifier, 8...Modulation signal input terminal, 9...Modulation diode input terminal, 10...Detector output terminal.
Claims (1)
出力を放射する輻射器と、前記輻射器に近接配置
され所定の輻射パターンを生ずる導波器、前記導
波器に接続され変調信号が加えられる可変インピ
ーダンス素子と、前記導波器から所定距離に配置
され、輻射電力の一部を受けて検波する検波素子
とを備え、前記検波素子による検波出力を増幅
し、変調信号とともに、前記インピーダンス素子
に加えるように構成したことを特徴とするミリ波
AM変調送信方式。1. A millimeter wave signal oscillator, a radiator that emits a signal output from the oscillator, a waveguide that is placed close to the radiator and generates a predetermined radiation pattern, and a variable waveguide that is connected to the waveguide and applies a modulation signal. It includes an impedance element and a detection element that is placed at a predetermined distance from the waveguide and receives and detects a part of the radiated power, and amplifies the detection output from the detection element and applies it to the impedance element together with the modulation signal. A millimeter wave characterized by being configured as follows.
AM modulation transmission method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56053515A JPS57168529A (en) | 1981-04-09 | 1981-04-09 | Millimeter wave am modulation transmitting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56053515A JPS57168529A (en) | 1981-04-09 | 1981-04-09 | Millimeter wave am modulation transmitting system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57168529A JPS57168529A (en) | 1982-10-16 |
| JPS6258564B2 true JPS6258564B2 (en) | 1987-12-07 |
Family
ID=12944952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56053515A Granted JPS57168529A (en) | 1981-04-09 | 1981-04-09 | Millimeter wave am modulation transmitting system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57168529A (en) |
-
1981
- 1981-04-09 JP JP56053515A patent/JPS57168529A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57168529A (en) | 1982-10-16 |
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