KR0115477Y1 - Frequency mixer - Google Patents
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- KR0115477Y1 KR0115477Y1 KR2019940025083U KR19940025083U KR0115477Y1 KR 0115477 Y1 KR0115477 Y1 KR 0115477Y1 KR 2019940025083 U KR2019940025083 U KR 2019940025083U KR 19940025083 U KR19940025083 U KR 19940025083U KR 0115477 Y1 KR0115477 Y1 KR 0115477Y1
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
- H03D7/14—Balanced arrangements
- H03D7/1425—Balanced arrangements with transistors
- H03D7/1441—Balanced arrangements with transistors using field-effect transistors
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
- H03D2200/0041—Functional aspects of demodulators
- H03D2200/0066—Mixing
- H03D2200/0074—Mixing using a resistive mixer or a passive mixer
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- Power Engineering (AREA)
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Abstract
본 고안은 엠엠아이씨 형태의 주파수혼합기에 관한 것으로 종래에 있어 중간주파수신호와 국부발진신호와의 좋은 분리특성을 위해 다수의 병렬공진부와 직렬공진부를 가지는 대역통과의 주파수전달특성을 갖는 회로를 필요로 했으며 이에따라 주파수혼합기의 부피가 커진다는 문제점이 있었다. 본 고안은 이를 해결하기 위해 대역통과의 특성을 갖는 회로에 국부발진신호의 주파수대역에서 주파수를 차단하는 특성을 갖는 재2직렬공진부를 병렬로 연결함으써, 간단한 구성으로 그리고 부피의 증가없이 중간주파수신호와 국부발진주파수신호와의 향상된 분리특성을 얻을 수 있도록 한 것이다.The present invention relates to a frequency mixer of MMC type, which requires a circuit having a frequency pass characteristic of a band pass having a plurality of parallel resonators and a series resonator in order to provide good separation between an intermediate frequency signal and a local oscillation signal. There was a problem that the volume of the frequency mixer increases accordingly. The present invention solves this problem by connecting a reserial series resonator having a characteristic of cutting off the frequency in the frequency band of the local oscillation signal in parallel to a circuit having a bandpass characteristic. The improved separation between the signal and the local oscillation frequency signal is obtained.
Description
제1도는 일반적인 엠엠아이씨 형태의 주파수혼합기 구성도.1 is a configuration diagram of a frequency mixer in the form of a general MC.
제2도는 엠엠아이씨 형태의 주파수혼합기에 사용되는 대역통과필터의 회로도로서 (a)는 종래 회로도 (b)는 본 고안 회로도.2 is a circuit diagram of a band pass filter used in an MMC type frequency mixer, where (a) is a conventional circuit diagram and (b) is a circuit diagram of the present invention.
제3도는 엠엠아이씨 형태의 주파수혼합기에 사용되는 대역통과필터의 주파수 특성도로서, (a)는 종래 주파수특성도 (b)는 본 고안 주파수특성도.3 is a frequency characteristic diagram of a bandpass filter used in an MMC type mixer, (a) is a conventional frequency characteristic diagram (b) is a frequency characteristic diagram of the present invention.
제4도는 제2도 (a)에 있는 제2직렬공진부에 대한 엠엠아이씨 평면도.4 is a plan view of an MC for the second series resonator in FIG.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
301 : 병렬공진부 302 : 제1직렬공진부301: parallel resonance unit 302: first series resonance unit
303 : 제2직렬공진부303: second series resonance unit
본 고안은 엠엠아이씨(MMIC;Monolithic Microwave Integrated Circuit) 형태의 주파수혼합기(Mixer)에 관한 것으로, 특히 간단한 구성으로 주파수전달특성의 스커트(Skirt)특성을 향상시킬 수 있도록 대역통과필터를 사용하여 중간주파신호와 국부발진신호와의 분리특성을 향상시키는 엠엠아이씨 형태의 주파수혼합기에 관한 것이다.The present invention relates to a mixer (MIXer) in the form of a MMIC (Monolithic Microwave Integrated Circuit), in particular a simple configuration to improve the frequency characteristic of the skirt (Skirt) characteristics of the band pass filter using a band pass filter to improve The present invention relates to a frequency mixer of an MC type which improves the separation characteristics of a signal and a local oscillation signal.
제1도는 전계효과트랜지스터를 사용한 일반적인 엠엠아이씨 형태의 주파수혼합기의 구성을 블럭화하여 보인 것으로, 입력단자(N1)를 통해 입력되는 고주파신호(RF)와 국부발진신호(LO)를 정합하여 전달하는 입력정합부(100)와, 상기 입력정합부(100)가 전달하는 고주파신호(RF)와 국부발진신호(LO)를 전계효과트랜지스터(FET)를 통해 입력받아서 정합과 동시에 중간주파신호(IF)를 추출하는 출력정합부(200)로 구성되어 있다.FIG. 1 is a block diagram showing the configuration of a typical MC-type frequency mixer using a field effect transistor, and an input for matching and transmitting a high frequency signal (RF) and a local oscillation signal (LO) input through an input terminal (N1). The matching unit 100 receives the high frequency signal RF and the local oscillation signal LO transmitted from the input matching unit 100 through the field effect transistor FET to match the intermediate frequency signal IF. It is composed of an output matching unit 200 to extract.
여기서, 출력정합부(200)는 상기한 바와같이 입력정합부(100)와 전계효과트랜지스터(FET)를 통해 입력되는 고주파신호와 국부발진신호로부터 중간주파신호(IF)를 추출해 낼 수 있도록, 고주파신호의 주파수(fS)와 국부발진신호의 국부발진주파수(fL)차단하는 필터(filter)와 같은 주파수전달특성을 가지고 있다.Herein, the output matching unit 200 extracts the intermediate frequency signal IF from the high frequency signal and the local oscillation signal input through the input matching unit 100 and the field effect transistor (FET) as described above. It has a frequency transfer characteristic such as a filter that cuts off the frequency fS of the signal and the local oscillation frequency fL of the local oscillation signal.
즉, 고주파신호 및 국부발진신호보다 주파수가 낮은 중간주파신호를 얻고자 할 때에는 출력정합부(200)는 저역통과의 주파수전달특성을 가지며, 고주파신호와 국부발진신호의 사이에 있는 주파수의 중간주파신호를 얻고자 할 때에는 출력정합부(200)는 대역통과의 주파수전달특성을 가진다.That is, in order to obtain an intermediate frequency signal having a frequency lower than that of the high frequency signal and the local oscillation signal, the output matching unit 200 has a low pass frequency transfer characteristic, and the intermediate frequency of the frequency between the high frequency signal and the local oscillation signal. In order to obtain a signal, the output matching unit 200 has a frequency transmission characteristic of a band pass.
특히, 국부발진신호에 인접한 주파수를 갖는 중간주파신호를 얻고자 할 때에는 출력정합부(200)는 스커트특성이 좋은 대역통과의 주파수전달특성을 가져야만 원하는 주파수의 중간주파신호를 얻을 수 있다.Particularly, in order to obtain an intermediate frequency signal having a frequency adjacent to the local oscillation signal, the output matching unit 200 may obtain an intermediate frequency signal having a desired frequency only when the output matching unit 200 has a frequency transmission characteristic of a band pass having a good skirt characteristic.
제2도 (a)는 상기 종래 엠엠아이씨 형태의 주파수혼합기에 사용되는 대역통과필터를 나타낸 것으로, 신호의 전달방향에 대해 병렬로 연결되는 병렬공진부(201)와, 신호의 전달방향에 대해 직렬로 연결되는 직렬공진부(202) 가 각각 N/2개씩 종속접속되는 형태로 구성되어 있다.FIG. 2 (a) shows a bandpass filter used in the conventional MMC type frequency mixer, in which a parallel resonance unit 201 connected in parallel with a signal transmission direction and a series with respect to the signal transmission direction are shown. The series resonator 202 connected to each other is configured in a form of cascaded N / 2 pieces each.
이처럼 구성되는 대역통과필터에서 주파수전달특성의 스커트특성은 병렬공진부(20l)와 직렬공진부(202)의 개수가 증가할수록 좋아지므로, 좋은 스커트특성을 얻기 위해서는 다수의 병렬공진부(201)와 직렬공진부(202)를 필요로 한다..In the band pass filter configured as described above, the skirt characteristic of the frequency transfer characteristic is improved as the number of the parallel resonator 20l and the series resonator 202 increases, so that a plurality of parallel resonators 201 and A series resonator 202 is required.
이와같은 구성과 작용을 가지는 종래 엠엠아이씨 형태의 주파수흔합기의 문제점은 주지한 바와같이 국부발진주파수에 인접하는 주파수의 중간주파신호를 얻고자 할 때 요구되는 좋은 스커트특성을 가지기 위해서는 다수의 병렬공진부와 직렬공진부를 추가해야 하기 때문에 추가되는 만큼 대역통과필터의 구성이 복잡해져서 주파수혼합기 전체의 부피가 커진다는 것이다.The problem of the conventional MMC type frequency combiner having such a configuration and operation is that a number of parallel resonances are required in order to have a good skirt characteristic required to obtain an intermediate frequency signal of a frequency adjacent to a local oscillation frequency. Since the part and the series resonant part need to be added, the configuration of the band pass filter becomes more complicated as it is added, thereby increasing the volume of the entire frequency mixer.
본 고안은 이러한 종래 엠엠아이씨 형태의 주파수혼합기의 문제점을 감안하여 안출된 것이며, 간단한 구성으로 그리고 부피증가없이 좋은 스커트특성을 가지는 대역통과필터를 사용하여 중간주파신호와 국부발진신호와의 분리특성을 향사시키는 엠엠아이씨 형태의 주파수혼합기를 제공하는 것을 목적으로 한다.The present invention was devised in view of the problems of the conventional MMC type frequency mixer, and the separation characteristics between the intermediate frequency signal and the local oscillation signal were obtained by using a band pass filter having a simple skirt structure and a good skirt characteristic without increasing the volume. It is an object of the present invention to provide a frequency mixer in the form of flavor MMC.
상기 목적에 따른 본 고안 엠엠아이씨 형태의 주파수흔합기는, 대역통과의 주파수전달특성을 결정하는 병렬공진부와 제1직렬공진부, 그리고 상기 제1직렬공진부에 병렬연결되어 상기 주파수전달특성의 스커트특성을 결정하는 제2직렬공진부로 구성된다.According to the object of the present invention, the MMC type frequency combiner is connected in parallel with the parallel resonant unit and the first series resonator unit and the first series resonator unit for determining the frequency transfer characteristics of the band pass. And a second series resonance unit for determining skirt characteristics.
이와같이 구성된 본 고안 엠엠아이씨 형태의 주파수혼합기에 대하여 하나의 구체적인 실시예를 나타낸 제2도 (b), 제3도 (b) 및 제4도를 참조하여 본 고안의 작용 및 효과를 상세히 설명한다.The operation and effects of the present invention will be described in detail with reference to FIGS. 2 (b), 3 (b) and 4 which show one specific embodiment of the present invention.
제2도 (b)에서 입력단자(IN2)를 통해 고주파신호(RF)와 국부발진신호(LO) 가 입력되면 제I직렬공진부(302)는 병렬공진부(301)와 더불어 결정된 대역통과의 주파수전달특성에 따라 상기 고주파신호익 국부발진신호는 차단하고 중간주파신호(IF)를 추출해 낸다.When the high frequency signal RF and the local oscillation signal LO are input through the input terminal IN2 in FIG. 2 (b), the I series resonator 302 is connected with the parallel resonator 301 to determine the band pass. The high frequency signal vane local oscillation signal is interrupted according to the frequency transfer characteristic and an intermediate frequency signal IF is extracted.
그리고, 제1직렬공진부(302)에 대해 병렬연결되어 있는 제2직렬공진부 (302)의 공진주파수(flo)는 일반적인 공진주파수 유도식으로 부터 하기의 식(1)과 같이 얻어지는데, 하기의 식(1)에 따라 결정되는 인덕터(Ls)의 인덕턴스와 콘덴서(Cs)의 커패시턴스로 상기 주파수전달곡선의 스커트특성을 향상시켜서, 최종적으로 제3도 (b)와 같은 주파수전달곡선이 얻어지도록 한다.In addition, the resonance frequency flo of the second series resonance unit 302 connected in parallel with the first series resonance unit 302 is obtained from the general resonance frequency induction equation as shown in Equation 1 below. The inductance of the inductor Ls and the capacitance of the capacitor Cs are determined according to Equation (1) to improve the skirt characteristic of the frequency transfer curve so that the frequency transfer curve as shown in FIG. do.
이때, 엠엠아이씨 형태의 주파수혼합기에서는 고주파신호의 전력보다 훨씬 큰 전력의 국부발진신호를 사용하므로, 이 국부발진신호가 중간주파신호에 미치는 영향이 커진다.In this case, since the MMC type frequency mixer uses a local oscillation signal having a much larger power than that of the high frequency signal, the influence of the local oscillation signal on the intermediate frequency signal is increased.
따라서 제2직렬공진부(303)를 구성 할 때 상기 공진주파수(fLO)가 국부발진신호의 주파수가 되도록 상기 'Ls'와 'Cs'의 값을 결정해 주면, 병렬공진부(301)와 제1직렬공진부(301)에서 발생된 공진주파수 성분을 제2직렬공진부(303) 에서 공진에 의해 차단(Short)하므로, 출력되는 중간주파수신호(IF)에는 공진주파수 성분이 제거된 것으로 된다.Therefore, when the second series resonator 303 is configured, the values of 'Ls' and 'Cs' are determined such that the resonance frequency fLO becomes the frequency of the local oscillation signal. Since the resonance frequency component generated by the first series resonance unit 301 is blocked by resonance in the second series resonance unit 303, the resonance frequency component is removed from the output intermediate frequency signal IF.
제3도 (b)의 주파수전달곡선은 종래의 (a)와 비교하여 볼 때 국부발진주파수대역에서의 스커트특성이 훨씬 좋아겼음을 알 수 있다.It can be seen that the frequency transfer curve of FIG. 3 (b) has a much better skirt characteristic in the local oscillation frequency band compared to the conventional (a).
한편, 제4도는 직각나선형 인덕터(303-1)와 엠아이엠(MIM;Metal ln Metal)형 콘덴서(303-2)로 구현된 상기 제2직렬공진부(303)의 평면도를 보인 것이다.FIG. 4 is a plan view of the second series resonator 303 implemented as a rectangular spiral inductor 303-1 and a metal in metal (MIM) type capacitor 303-2.
이상에서 상세히 설명한 바와같이, 다수의 병렬공진부를 추가해야만 향상된 증간주파수와 국부발진주파수와의 분리특성을 얻을 수 있었던 종래와는 달리, 본 고안 엠엠아이씨 형태의 주파수혼합기는, 중간주파수가 나오는 출력회로에 국부발진주파수에서 스커트특성을 갖는 대역통과필터와 제2직렬공진부를 병렬로 연결해 주는 것만으로, 엠엠아이씨 형태의 주파수혼합기에서의 중간주파수신호와 국부발진신호와의 향상된 분리특성을 얻을 수 있으므로 구성이 간단해지면서 주파수혼합기의 부피도 줄어드는 효과가 있다.As described in detail above, unlike the conventional art in which improved parallel frequency and local oscillation frequency separation characteristics can be obtained only by adding a plurality of parallel resonators, the MC mixer-type frequency mixer of the present invention has an output circuit having an intermediate frequency. By simply connecting the band pass filter having the skirt characteristic at the local oscillation frequency and the second series resonator in parallel, an improved separation characteristic between the intermediate frequency signal and the local oscillation signal can be obtained in the MC-type frequency mixer. This simplification also reduces the volume of the frequency mixer.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019940025083U KR0115477Y1 (en) | 1994-09-28 | 1994-09-28 | Frequency mixer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019940025083U KR0115477Y1 (en) | 1994-09-28 | 1994-09-28 | Frequency mixer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR960012786U KR960012786U (en) | 1996-04-17 |
| KR0115477Y1 true KR0115477Y1 (en) | 1998-04-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019940025083U KR0115477Y1 (en) | 1994-09-28 | 1994-09-28 | Frequency mixer |
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| KR (1) | KR0115477Y1 (en) |
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1994
- 1994-09-28 KR KR2019940025083U patent/KR0115477Y1/en not_active IP Right Cessation
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| KR960012786U (en) | 1996-04-17 |
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