CN211429271U

CN211429271U - Circuit layout compatible with mixing direction

Info

Publication number: CN211429271U
Application number: CN201922090109.XU
Authority: CN
Inventors: 骆芃宇; 李元元
Original assignee: Chengdu Jiatai Huali Technology Co ltd
Current assignee: Chengdu Jiatai Huali Technology Co ltd
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2020-09-04
Anticipated expiration: 2029-11-28

Abstract

The utility model discloses a circuit layout of compatible mixing direction, including the circuit cavity, be equipped with cross microwave groove in the circuit cavity, cross microwave groove cross center is equipped with the mixer chip, and mixer chip one side is equipped with first attenuator chip and first chip electric capacity in proper order, and both ends are equipped with second attenuator chip and third attenuator chip respectively about the mixer chip is last, and second attenuator chip upper end one side is equipped with chip filter in proper order, amplifier chip, second chip electric capacity and fourth attenuator chip, and fourth attenuator chip one side is the radio frequency coaxial cable hole. The utility model has the advantages that: the design is a cross layout mode which takes a bare chip mixer as a center and is arranged up, down, left and right, and because the double-balanced mixer has the characteristic of being capable of exchanging a local oscillator signal input port LO and a radio frequency signal input port RF when being used under partial conditions, the circuit design cost is reduced, and the modular design is realized.

Description

Circuit layout compatible with mixing direction

Technical Field

The utility model relates to a circuit layout design technical field specifically is a circuit layout of compatible mixing direction.

Background

The mixer is a three-port device, which is a radio frequency RF, local oscillator LO and intermediate frequency IF end, wherein the RF/IF end can be used as input or output end of signal, and the LO end can be used as input only. A common mixer port is shown in fig. 5, and therefore a T-shaped layout is generally adopted in circuit design. The placement direction of the mixer is determined according to the port position of the RF/IF signal, so that the direction of an LO port is determined, the design of a peripheral circuit and a structure can be designed according to the signal flow direction of three ports of the mixer, and in the design process of the radio frequency microwave circuit, the structure design is often determined together with the circuit design without an adjusting space. Therefore, the mixer circuit with the T-shaped layout is generally designed only for a single time and has poor universality.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a circuit layout of compatible mixing direction to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a circuit layout of compatible mixing direction, includes the circuit cavity, be equipped with cross microwave groove in the circuit cavity, cross microwave groove cross center is equipped with the mixer chip, mixer chip one side is equipped with first attenuator chip and first chip electric capacity in proper order, both ends are equipped with second attenuator chip and third attenuator chip respectively about the mixer chip, second attenuator chip upper end one side is equipped with chip filter, amplifier chip, second chip electric capacity and fourth attenuator chip in proper order, mixer chip, first attenuator chip, first chip electric capacity, second attenuator chip, third attenuator chip, chip filter, amplifier chip, second chip electric capacity and fourth attenuator chip all set up on high frequency panel, fourth attenuator chip one side is the coaxial cable hole of radio frequency.

Preferably, the depth and the width of the cross-shaped microwave slot are both 2 mm.

Preferably, the other end of the first chip capacitor, which is located in the cross-shaped microwave slot and is far from the first attenuator chip, is an IF input signal port.

Preferably, the other end of the third attenuator chip, which is far away from the mixer chip, is an RF output signal port.

Preferably, an input port of a local oscillator signal LO end is arranged on the other side of the radio frequency coaxial cable hole, which is far away from the high-frequency plate and the fourth attenuator chip.

Preferably, the second chip capacitor and the upper end of the high-frequency plate are both provided with feed interfaces.

Preferably, the circuit cavity is made of copper.

Advantageous effects

The design is a layout mode which takes a bare chip mixer as a center and is in a cross shape from top to bottom, left to right, and the design has the characteristic of exchanging an input port LO of a local oscillator signal and an input port RF of a radio frequency signal when the double-balanced mixer is used under the partial condition. After RF and LO ports are exchanged, the problem of increased signal leakage caused by reduction of signal isolation is easily solved through a filter, and the system cannot be influenced under general conditions. Different frequency conversion functions can be realized in the same circuit layout, the circuit design cost is reduced, and the modular design is realized.

Drawings

Fig. 1 is a schematic plan view of the circuit layout of the present invention when inputting IF signals and outputting RF signals;

fig. 2 is a schematic plan view of the circuit layout when RF signals are input and IF signals are output according to the present invention;

FIG. 3 is a schematic plan view of the placement direction of the mixers in FIG. 1;

fig. 4 is a schematic plan view of the placement direction of the mixer in fig. 2.

Fig. 5 is a schematic plan view of the placement direction of a mixer in the prior art.

Reference numerals

1-circuit cavity, 2-mixer chip, 3-first attenuator chip, 4-first chip capacitor, 5-second attenuator chip, 6-third attenuator chip, 7-high frequency plate, 8-chip filter, 9-amplifier chip, 10-second chip capacitor, 11-fourth attenuator chip, and 12-radio frequency coaxial cable hole.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

Example 1

As shown in fig. 1-5, a circuit layout compatible with a mixing direction includes a circuit cavity 1, a cross microwave slot is provided in the circuit cavity 1, a mixer chip 2 is provided at the cross center of the cross microwave slot, a first attenuator chip 3 and a first chip capacitor 4 are sequentially provided at one side of the mixer chip 2, a second attenuator chip 5 and a third attenuator chip 6 are respectively provided at the upper and lower ends of the mixer chip 2, a chip filter 8, an amplifier chip 9, a second chip capacitor 10 and a fourth attenuator chip 11 are sequentially provided at one side of the upper end of the second attenuator chip 5, and a radio frequency coaxial cable hole 12 is provided at one side of the fourth attenuator chip 11.

Preferably, the cross-shaped microwave slot is an IF input signal port at the other end of the first chip capacitor 4 remote from the first attenuator chip 3.

Preferably, the other end of the third attenuator chip 6, remote from the mixer chip 2, is an RF output signal port.

Preferably, the other side of the radio frequency coaxial cable hole 12 away from the high-frequency plate 7 and the fourth attenuator chip 11 is provided with an input port of a local oscillator signal LO end.

Preferably, the second chip capacitor 10 and the upper end of the high-frequency plate 7 are both provided with a feed interface.

Preferably, the circuit chamber 1 is made of copper.

Preferably, the mixer chip 2, the first attenuator chip 3, the first chip capacitor 4, the second attenuator chip 5, the third attenuator chip 6, the chip filter 8, the amplifier chip 9, the second chip capacitor 10 and the fourth attenuator chip 11 are all disposed on the high-frequency board 7.

As shown in fig. 1, according to the signal flow direction, a signal is input from the RF terminal, output from the IF terminal, and a local oscillator signal is input from the LO terminal.

As shown in fig. 2, according to the signal flow direction, the signal is input from the IF terminal and output from the LO terminal, and the local oscillator signal is input from the RF terminal. This takes advantage of the fact that the RF and LO ports of the double balanced mixer can be used interchangeably.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the content of the present invention within the protection scope of the present invention.

Claims

1. A circuit layout compatible with mixing directions comprises a circuit cavity (1), and is characterized in that: the circuit comprises a circuit cavity body (1), a cross microwave groove is arranged in the circuit cavity body (1), a mixer chip (2) is arranged at the cross center of the cross microwave groove, a first attenuator chip (3) and a first chip capacitor (4) are sequentially arranged on one side of the mixer chip (2), a second attenuator chip (5) and a third attenuator chip (6) are respectively arranged at the upper end and the lower end of the mixer chip (2), a chip filter (8), an amplifier chip (9), a second chip capacitor (10) and a fourth attenuator chip (11) are sequentially arranged on one side of the upper end of the second attenuator chip (5), the mixer chip (2), the first attenuator chip (3), the first chip capacitor (4), the second attenuator chip (5), the third attenuator chip (6), the chip filter (8), the amplifier chip (9), the second chip capacitor (10) and the fourth attenuator chip (11) are all arranged on a high-frequency plate (7), and one side of the fourth attenuator chip (11) is provided with a radio frequency coaxial cable hole (12).

2. The circuit arrangement according to claim 1, wherein: the depth and the width of the cross-shaped microwave groove are both 2 mm.

3. The circuit arrangement according to claim 1, wherein: and an IF input signal port is formed at the other end of the first chip capacitor (4) far away from the first attenuator chip (3) in the cross-shaped microwave slot.

4. The circuit arrangement according to claim 1, wherein: and the other end of the third attenuator chip (6), which is far away from the mixer chip (2), is an RF output signal port.

5. The circuit arrangement according to claim 1, wherein: and a local oscillator signal LO end input port is arranged on the other side of the radio frequency coaxial cable hole (12) far away from the high-frequency plate (7) and the fourth attenuator chip (11).

6. The circuit arrangement according to claim 1, wherein: and feed interfaces are arranged at the upper ends of the second chip capacitor (10) and the high-frequency plate (7).

7. The circuit arrangement according to claim 1, wherein: the circuit cavity (1) is made of copper.