JPH05240946A - Millimeter wave band radar device - Google Patents

Millimeter wave band radar device

Info

Publication number
JPH05240946A
JPH05240946A JP4079280A JP7928092A JPH05240946A JP H05240946 A JPH05240946 A JP H05240946A JP 4079280 A JP4079280 A JP 4079280A JP 7928092 A JP7928092 A JP 7928092A JP H05240946 A JPH05240946 A JP H05240946A
Authority
JP
Japan
Prior art keywords
gunn diode
radar device
millimeter wave
oscillator
diode
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.)
Pending
Application number
JP4079280A
Other languages
Japanese (ja)
Inventor
Hidetoshi Kondo
秀敏 近藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP4079280A priority Critical patent/JPH05240946A/en
Publication of JPH05240946A publication Critical patent/JPH05240946A/en
Pending legal-status Critical Current

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  • Radar Systems Or Details Thereof (AREA)

Abstract

PURPOSE:To contrive the simplicity, small size and lightweight of constitution of a small-sized millimeter wave radar device. CONSTITUTION:A voltage control oscillator consists of a Gunn diode for oscillation 1 and a varactor diode 2, a transmission means 6 and a receiving means 7 connected to the oscillator through a circulator 4 and a bias circuit 3 for supplying bias to the oscillator are equipped for the millimeter wave band radar device. And the constitution is characterized in that a receiving signal is superimposed to the Gunn diode 1 through a circulator 4 and a bead signal equivalent to a transmission and receiving frequency difference is taken out from both terminals of the Gunn diode 1. A frequency convertor can be eliminated in order that the bead signal may be taken out from the Gunn diode 1.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明はミリ波帯レーダ装置に関
し、特に簡単な構成で実現できる小型化レーダ装置に関
する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a millimeter wave band radar device, and more particularly to a miniaturized radar device which can be realized with a simple structure.

【0002】[0002]

【従来の技術】一般に、ミリ波はマイクロ波に比較し、
電波の直進性に優れ伝搬減衰量が大きいので、電波到達
距離の短いレーダ装置への応用が有効である。図3に従
来のミリ波帯FM−CWレーダの一例のブロック図を示
す。電圧制御発振器11,方向性結合器12,周波数変
換器13,IF増幅器14で構成される送受信機15
と、送信アンテナ16、受信アンテナ17にて構成され
ている。この構成では、電圧制御発振器11で発生した
ミリ波信号は送信アンテナ16より送信され、目標物体
で反射され時間τだけ遅れて受信信号として受信アンテ
ナ17で受信される。そして、周波数変換器13により
送受信周波数が混合され、その差周波数に相当したビー
ト信号を得て、IF増幅器14で増幅して取り出してい
る。
2. Description of the Related Art In general, millimeter waves are
Since it has excellent straightness of radio waves and a large amount of propagation attenuation, it is effective to be applied to a radar device having a short radio wave reach. FIG. 3 shows a block diagram of an example of a conventional millimeter-wave band FM-CW radar. Transceiver 15 including voltage controlled oscillator 11, directional coupler 12, frequency converter 13, and IF amplifier 14.
And a transmitting antenna 16 and a receiving antenna 17. In this configuration, the millimeter wave signal generated by the voltage controlled oscillator 11 is transmitted from the transmission antenna 16, reflected by the target object, and received by the reception antenna 17 as a reception signal with a delay of time τ. Then, the transmission / reception frequencies are mixed by the frequency converter 13, a beat signal corresponding to the difference frequency is obtained, amplified by the IF amplifier 14, and taken out.

【0003】図4(a)〜(c)に前記した送信信号、
受信信号、及びIFビート信号波形を示す。
The transmission signals described above in FIGS. 4 (a) to 4 (c),
The reception signal and the IF beat signal waveform are shown.

【0004】[0004]

【発明が解決しようとする課題】このような従来のレー
ダ装置を自動車や航空機に搭載する場合は、小型化、軽
量化が強く要求される。特にミリ波帯では導波管接続と
なるため、機器の構成品目数を減らすことも実装上非常
に重要である。しかしながら、従来の装置では方向性結
合器や周波数変換器等の比較的に大型の部品が必要とさ
れるために、小型化、軽量化を図ることは困難である。
本発明の目的は、簡単な構成で実現できる小型ミリ波レ
ーダ装置を提供することにある。
When such a conventional radar device is mounted on an automobile or an aircraft, there is a strong demand for downsizing and weight reduction. Especially in the millimeter-wave band, waveguide connection is used, so reducing the number of component items of equipment is also very important for mounting. However, in the conventional device, it is difficult to reduce the size and weight because relatively large components such as a directional coupler and a frequency converter are required.
It is an object of the present invention to provide a small millimeter wave radar device that can be realized with a simple configuration.

【0005】[0005]

【課題を解決するための手段】本発明は、発振用ガンダ
イオードとバラクタダイオードからなる電圧制御発振器
と、この発振器にサーキュレータを介して接続された送
信手段及び受信手段と、前記発振器にバイアスを供給す
るバイアス回路とを備えており、受信信号をサーキュレ
ータを介してガンダイオードに重畳し、ガンダイオード
の両端から送受信周波数差に相当するビート信号を取り
出すように構成する。又、ビート信号をバイアス回路か
ら取り出すように構成する。
SUMMARY OF THE INVENTION The present invention provides a voltage controlled oscillator comprising an oscillation Gunn diode and a varactor diode, a transmitting unit and a receiving unit connected to the oscillator via a circulator, and a bias to the oscillator. And a bias circuit for performing a superposition of a reception signal on a Gunn diode via a circulator, and extracting a beat signal corresponding to a difference in transmission and reception frequency from both ends of the Gunn diode. Further, the beat signal is taken out from the bias circuit.

【0006】[0006]

【作用】ガンダイオードからビート信号を取り出すた
め、周波数変換器を省略することが可能となる。
Since the beat signal is extracted from the Gunn diode, the frequency converter can be omitted.

【0007】[0007]

【実施例】次に、本発明について図面を参照して説明す
る。図1は本発明の一実施例の構成を示すブロック図で
ある。1はガンダイオード、2はバラクタダイオードで
あり、これらで電圧制御発振器を構成する。3は前記ガ
ンダイオード2にバイアスを供給するバイアス回路、4
はサーキュレータであり、前記電圧制御発振器と共に送
受信機を構成する。6は送信アンテナ、7は受信アンテ
ナである。この構成において、ガンダイオード1がミリ
波信号を発振し、バラクタへの印加電圧を掃引すること
により、図4(a)の送信信号が得られる。この送信信
号は送信アンテナ6より放射され、目標物体に当たって
図4(b)の受信信号として受信アンテナ7に入力され
る。この受信信号はサーキュレータ4を介して再びガン
ダイオード1に重畳される。
DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. Reference numeral 1 is a Gunn diode, and 2 is a varactor diode, which constitute a voltage controlled oscillator. 3 is a bias circuit for supplying a bias to the Gunn diode 2, 4
Is a circulator, which constitutes a transceiver together with the voltage controlled oscillator. Reference numeral 6 is a transmitting antenna, and 7 is a receiving antenna. In this configuration, the Gunn diode 1 oscillates a millimeter wave signal and sweeps the voltage applied to the varactor, whereby the transmission signal of FIG. 4A is obtained. This transmission signal is radiated from the transmission antenna 6, hits the target object, and is input to the reception antenna 7 as the reception signal of FIG. This received signal is superimposed on the Gunn diode 1 again via the circulator 4.

【0008】ここで、ガンダイオードは非線型素子であ
るので、送信周波数と受信周波数が混合され、各々の差
周波ビート信号がガンダイオード1の両端より得られ
る。又、このビート信号はガンダイオード1で増幅さ
れ、バイアス回路3の容量結合端子より出力され、レー
ダ信号処理回路に入力される。
Since the Gunn diode is a non-linear element, the transmission frequency and the reception frequency are mixed, and the difference frequency beat signals are obtained from both ends of the Gunn diode 1. The beat signal is amplified by the Gunn diode 1, output from the capacitive coupling terminal of the bias circuit 3, and input to the radar signal processing circuit.

【0009】図2はバイアス回路の別の実施例を示す回
路図であり、このバイアス回路3Aはトランス結合8に
よりビート信号を取り出すことが可能である。したがっ
て、このレーダ装置では、ガンダイオード1によりビー
ト信号を得ているので、周波数変換器が不要になるた
め、小型化、軽量化が実現できる。特にミリ波帯では低
価格化への寄与も大きい。
FIG. 2 is a circuit diagram showing another embodiment of the bias circuit. This bias circuit 3A can take out a beat signal by a transformer coupling 8. Therefore, in this radar device, since the beat signal is obtained by the Gunn diode 1, the frequency converter is not necessary, and the size and weight can be reduced. Especially in the millimeter-wave band, it contributes significantly to lower prices.

【0010】[0010]

【発明の効果】以上説明したように本発明のミリ波レー
ダ装置は、バラクタダイオードとガンダイオードとで電
圧制御発振器を構成し、ガンダイオードによって送受周
波数さに相当するビート信号を得ているので、周波数変
換器が不要となり、構成を簡略化して小型・軽量化,低
価格化が実現でき、自動車や航空機搭載用として極めて
実用的効果が大きい。
As described above, in the millimeter wave radar device of the present invention, the varactor diode and the Gunn diode constitute the voltage controlled oscillator, and the Gunn diode obtains the beat signal corresponding to the transmission / reception frequency. It eliminates the need for a frequency converter, simplifies the configuration, realizes small size, light weight, and low price, and is extremely useful for mounting on automobiles and aircraft.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明のレーダ装置の一実施例の回路図であ
る。
FIG. 1 is a circuit diagram of an embodiment of a radar device of the present invention.

【図2】本発明におけるバイアス回路の他の実施例の回
路図である。
FIG. 2 is a circuit diagram of another embodiment of the bias circuit according to the present invention.

【図3】従来のレーダ装置のブロック図である。FIG. 3 is a block diagram of a conventional radar device.

【図4】FM−CWレーダにおける信号波形を示す図で
ある。
FIG. 4 is a diagram showing a signal waveform in an FM-CW radar.

【符号の説明】[Explanation of symbols]

1 ガンダイオード 2 バラクタダイオード 3,3A バイアス回路 4 サーキュレータ 5 送受信機 6 送信アンテナ 7 受信アンテナ 1 Gunn diode 2 Varactor diode 3,3A Bias circuit 4 Circulator 5 Transceiver 6 Transmitting antenna 7 Receiving antenna

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 発振用ガンダイオードとバラクタダイオ
ードからなる電圧制御発振器と、この発振器にサーキュ
レータを介して接続された送信手段及び受信手段と、前
記発振器にバイアスを供給するバイアス回路とを備え、
受信信号を前記サーキュレータを介して前記ガンダイオ
ードに重畳し、前記ガンダイオードの両端から送受信周
波数差に相当するビート信号を取り出すように構成した
ことを特徴とするミリ波帯レーダ装置。
1. A voltage controlled oscillator comprising an oscillation Gunn diode and a varactor diode, transmitting means and receiving means connected to the oscillator through a circulator, and a bias circuit for supplying a bias to the oscillator.
A millimeter wave band radar device characterized in that a received signal is superimposed on the Gunn diode via the circulator, and a beat signal corresponding to a transmission / reception frequency difference is extracted from both ends of the Gunn diode.
【請求項2】 ビート信号をバイアス回路から取り出す
ようにしてなる請求項1のミリ波帯レーダ装置。
2. The millimeter wave radar device according to claim 1, wherein the beat signal is taken out from the bias circuit.
JP4079280A 1992-02-29 1992-02-29 Millimeter wave band radar device Pending JPH05240946A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4079280A JPH05240946A (en) 1992-02-29 1992-02-29 Millimeter wave band radar device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4079280A JPH05240946A (en) 1992-02-29 1992-02-29 Millimeter wave band radar device

Publications (1)

Publication Number Publication Date
JPH05240946A true JPH05240946A (en) 1993-09-21

Family

ID=13685459

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4079280A Pending JPH05240946A (en) 1992-02-29 1992-02-29 Millimeter wave band radar device

Country Status (1)

Country Link
JP (1) JPH05240946A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4990089A (en) * 1972-12-27 1974-08-28
JPH0247579A (en) * 1988-08-08 1990-02-16 Koubukuro Kosakusho:Kk Distance measuring apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4990089A (en) * 1972-12-27 1974-08-28
JPH0247579A (en) * 1988-08-08 1990-02-16 Koubukuro Kosakusho:Kk Distance measuring apparatus

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