CN109066026B - A Ka-band dual-channel duplexer suitable for multi-antenna arrays - Google Patents

Abstract

The utility model discloses a Ka-band dual-channel duplexer suitable for a multi-antenna array, which comprises a main shell, an upper cover plate and a lower cover plate, wherein the main shell is provided with an upper transmission channel and a lower transmission channel, a partition plate is arranged between the upper transmission channel and the lower transmission channel, two parallel upper public input ports and lower public input ports, two high-channel output ports and two low-channel output ports are arranged on the side wall of the main shell, the two high-channel output ports of the upper public input ports are communicated with the upper transmission channel, and the two lower public input ports and the two low-channel output ports are communicated with the lower transmission channel. The utility model realizes the integration of the diplexer of two channels in a limited space, and can realize two public ends and four corresponding channel output ends at the same time.

Description

A Ka-band dual-channel duplexer suitable for multi-antenna arrays

technical field

The invention relates to a Ka-band duplexer, in particular to a Ka-band dual-channel duplexer suitable for multi-antenna arrays, and belongs to the technical field of millimeter-wave radar and communication. The invention relates to the field of millimeter wave radar and communication, and is especially suitable for use in the field of communication.

Background technique

Duplexers are often used in radar or communication systems to provide isolation between different channels. In the millimeter wave frequency band, the duplexer is usually implemented based on the waveguide structure, because the waveguide structure has the characteristics of low loss and high power capacity. Regardless of the implementation principle and structural form, the existing duplexers are basically single-channel, that is, only include one common terminal and two corresponding output terminals.

For example, the utility model patent "A Ka-band Duplexer" written by Wang Qingfen and others published in 2010, the duplexer is based on a waveguide structure and has an independent transmission channel, and the input and output ports of the duplexer are connected to the transmission channel. Vertical, if you want to achieve dual channels, the two channels can only be in the back-to-back position. In the actual application of multi-antenna systems, multiple antennas are generally arranged opposite to each other, so this duplexer structure is not suitable for multi-antenna systems. antenna system.

In 2013, the Journal of Hangzhou Dianzi University reported the paper "Development of Ka-band Waveguide Duplexer" written by Zhang Zhihong and others. This paper realized a band-pass filter based on an E-face metal diaphragm, which also belongs to a single-channel filter. , has a common terminal and two corresponding output terminals, and the directions of the two output terminals are opposite, which is not suitable for the array antenna system with the same orientation.

The invention patent "A Ka-band Duplexer" written by Lin Xianqi and others published in 2014, the duplexer is based on the principle of electromagnetic induction transparency, and a bandpass filter is realized through a dielectric substrate to form a duplexer. It has the characteristics of miniaturized structure and also has an independent transmission channel. The duplexer involves two structures of metal and PCB, the process is complicated, and there must be installation errors when the PCB dielectric diaphragm and the metal cavity are integrated, which is easy to affect the performance.

So far, there has been no public report on a dual-channel integrated duplexer using two non-standard common terminals and four corresponding output terminals.

Contents of the invention

Aiming at the existing duplexer's low integration level, complex process, and difficulty in applying to large-scale array systems, the present invention proposes a duplexer structure that uses non-standard public ports and integrates two channels, and has a highly compact structure. It is suitable for the array system of sending and receiving different frequency transmission. It is a device that completes the synchronous transmission of sending and receiving different frequencies in the radar or communication channel with array characteristics. The specific technical scheme is as follows:

A Ka-band dual-channel duplexer suitable for multi-antenna arrays is characterized in that it includes a main housing, an upper cover and a lower cover, and the side of the main housing near the upper cover is provided with an upper transmission channel, A lower transmission channel is provided on one side close to the lower cover plate, and a partition plate is provided between the upper transmission channel and the lower transmission channel,

The side wall of the main housing is provided with two side-by-side common ports of the upper transmission channel and the common port of the lower transmission channel, and the common ports of the upper transmission channel and the common port of the lower transmission channel are respectively located On the side, the common port of the upper transmission channel is connected with the upper transmission channel, and the common port of the lower transmission channel is connected with the lower transmission channel;

The diagonal of the common port of the upper transmission channel is provided with a low-pass band port of the upper transmission channel and a high-pass band port of the upper transmission channel, between the low-pass band port of the upper transmission channel and the high-pass band port of the upper transmission channel An upper transmission channel partition wall is provided, and the upper transmission channel partition wall extends to a common port close to the upper transmission channel;

The diagonal of the common port of the lower transmission channel is provided with a low-pass band port of the lower transmission channel and a high-pass band port of the lower transmission channel, between the low-pass band port of the lower transmission channel and the high-pass band port of the lower transmission channel A lower transmission channel partition wall is provided, and the lower transmission channel partition wall extends to a common port close to the lower transmission channel.

Both the common port of the upper transmission channel and the common port of the lower transmission channel adopt narrow-side compressed non-standard interfaces and non-standard flanges, and are arranged side by side along the thickness direction of the main shell.

The common port of the upper transmission channel is connected with the low-pass band port of the upper transmission channel and the high-pass band port of the upper transmission channel through the H-T joint, and the common port of the lower transmission channel is connected with the low-pass band port and the lower transmission channel of the lower transmission channel through the H-T joint. The high-pass band port of the transmission channel, the upper transmission channel and the lower transmission channel all adopt the H film structure, and adopt the non-standard waveguide cavity size with narrow side compression.

The low-pass band port of the upper transmission channel, the high-pass band port of the upper transmission channel, the low-pass band port of the lower transmission channel and the high-pass band port of the lower transmission channel all adopt standard WR28 waveguide interface and non-standard flange.

The public port of the upper transmission channel is provided with two steps of the common port of the upper transmission channel, and the two steps of the common port of the upper transmission channel rise from the upper transmission channel towards the common port of the upper transmission channel;

The public port of the lower transmission channel is provided with two steps of the common port of the lower transmission channel, and the two steps of the common port of the lower transmission channel rise from the lower transmission channel toward the common port of the lower transmission channel;

The low passband port of the upper transmission channel is provided with two steps of the lower sideband port of the upper transmission channel, and the two steps of the lower sideband port of the upper transmission channel rise from the low passband port of the upper transmission channel towards the middle step of the upper transmission channel;

The high-pass band port of the upper transmission channel is provided with two steps of the upper sideband port of the upper transmission channel; the two steps of the upper sideband port of the upper transmission channel rise from the high-pass band port of the upper transmission channel towards the middle step of the upper transmission channel;

The low passband port of the lower transmission channel is provided with two steps of the lower sideband port of the lower transmission channel; the two steps of the lower sideband port of the lower transmission channel rise from the low passband port of the lower transmission channel toward the middle step of the lower transmission channel;

The high-pass band port of the lower transmission channel is provided with two steps of the upper side band port of the lower transmission channel; the upper side band port of the lower transmission channel has two steps;

The upper transmission channel partition wall divides the upper transmission channel into an upper transmission channel low-pass band coupling cavity and an upper transmission channel high-pass band coupling cavity, and an upper transmission channel low-pass band coupling cavity is opened between the side wall of the main housing and the upper transmission channel low-pass band coupling cavity There are several low-pass band tuning screw holes of the upper transmission channel, and several high-pass band tuning screw holes of the upper transmission channel are opened between the side wall of the main housing and the high-pass band coupling cavity of the upper transmission channel;

The lower transmission channel partition wall divides the lower transmission channel into a lower transmission channel low-pass band coupling cavity and a lower transmission channel high-pass band coupling cavity, and the side wall of the main housing and the lower transmission channel low-pass band coupling cavity are opened. There are several low-pass band tuning screw holes of the lower transmission channel, and several high-pass band tuning screw holes of the lower transmission channel are opened between the side wall of the main housing and the high-pass band coupling cavity of the lower transmission channel.

The beneficial effects of the present invention are:

The present invention proposes a Ka-band duplexer. The duplexer comprehensively adopts a back-to-back structure, a non-standard waveguide port with a compressed size, and an H film coupling structure, and realizes the duplexer integration of two channels in a limited space. It can realize two common ports and four corresponding channel output ports at the same time, and the thickness of the whole structure is only 10.8mm, and the channel can be easily expanded to meet the application requirements of large-scale arrays.

Description of drawings

Fig. 1 is the structural composition of the front perspective of the present invention;

Fig. 2 is the structural composition of the rear view angle of the present invention;

Fig. 3 is a schematic diagram of the front view of the position of each port of the present invention;

Fig. 4 is a schematic diagram of the back view of the position of each port of the present invention;

Fig. 5 and Fig. 6 are schematic diagrams of 16-channel duplexer components composed of 8 groups of duplexers of the present invention;

Fig. 7 is single channel low-pass band performance curve of the present invention;

Fig. 8 is the single channel high-pass band performance curve of the present invention;

List of reference signs:

1—main housing,

2—upper cover,

3—lower cover plate,

4—upper transmission channel,

4-1—the public port of the upper transmission channel,

4-2—Low-pass band port of the upper transmission channel,

4-3—The high-pass band port of the upper transmission channel,

5—lower transmission channel,

5-1—the public port of the lower transmission channel,

5-2—Low-pass band port of the lower transmission channel,

5-3—The high-pass band port of the lower transmission channel,

6-1—the public port of the upper transmission channel has two steps,

6-2—The public port of the lower transmission channel has two steps,

6-3—The lower sideband port of the upper transmission channel has two steps

6-4—Two steps of the upper sideband port of the upper transmission channel

6-5—The lower sideband port of the lower transmission channel has two steps

6-6—The upper sideband port of the lower transmission channel has two steps

7-1—Low pass band tuning screw hole for upper transmission channel,

7-2—The high-pass band tuning screw hole of the upper transmission channel,

8-1—Low pass band tuning screw hole for lower transmission channel,

8-2—The high-pass band tuning screw hole of the lower transmission channel,

9—upper transmission channel partition wall,

10—lower transmission channel partition wall.

Detailed ways

The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention but not to limit the scope of the present invention.

With reference to Figures 1-6, the Ka-band dual-channel duplexer suitable for multi-antenna arrays of the present invention includes a main housing 1, an upper cover 2 and a lower cover 3, and the main housing 1 is close to the upper cover 2 One side of the upper transmission channel 4 is provided, and the lower transmission channel 5 is provided on the side close to the lower cover plate 3, and a partition plate is arranged between the upper transmission channel 4 and the lower transmission channel 5,

The side wall of the main housing 1 is provided with two side-by-side common ports 4-1 of the upper transmission passage and a common port 5-1 of the lower transmission passage, and the common port 4-1 of the upper transmission passage and the lower transmission passage The common ports 5-1 of the upper transmission channel are respectively located on both sides of the partition plate, the common port 4-1 of the upper transmission channel is connected with the upper transmission channel 4, and the common port 5-1 of the lower transmission channel is connected with the lower transmission channel 5 ;

The diagonal of the common port 4-1 of the upper transmission channel is provided with the low-pass band port 4-2 of the upper transmission channel and the high-pass band port 4-3 of the upper transmission channel, and the low-pass band port 4 of the upper transmission channel An upper transmission channel partition wall 9 is arranged between -2 and the high-pass band port 4-3 of the upper transmission channel, and the upper transmission channel partition wall extends to the common port 4-1 close to the upper transmission channel;

The diagonal of the common port 5-1 of the lower transmission channel is provided with the low-pass band port 5-2 of the lower transmission channel and the high-pass band port 5-3 of the lower transmission channel, and the low-pass band port 5 of the lower transmission channel A lower transmission channel partition wall 10 is arranged between -2 and the high-pass band port 5-3 of the lower transmission channel, and the lower transmission channel partition wall 10 extends to be close to the common port 5-1 of the lower transmission channel.

Both the common port 4 - 1 of the upper transmission channel and the common port 5 - 1 of the lower transmission channel adopt narrow side compressed non-standard interfaces and non-standard flanges, and are arranged side by side along the thickness direction of the main casing 1 .

The public port 4-1 of the upper transmission channel is connected to the low-pass band port 4-2 of the upper transmission channel and the high-pass band port 4-3 of the upper transmission channel through the H-T connector, and the common port 5-1 of the lower transmission channel is passed through the H-T The connector and the low-pass band port 5-2 of the lower transmission channel and the high-pass band port 5-3 of the lower transmission channel, the upper transmission channel 4 and the lower transmission channel 5 both adopt the H-film sheet structure, and use non-standard waveguides with narrow edge compression cavity size.

The low-pass band port 4-2 of the upper transmission channel, the high-pass band port 4-3 of the upper transmission channel, the low-pass band port 5-2 of the lower transmission channel and the high-pass band port 5-3 of the lower transmission channel all adopt standard WR28 waveguide Interface and non-standard flange.

The public port 4-1 of the upper transmission channel is provided with two steps 6-1 of the common port of the upper transmission channel, and the two steps 6-1 of the public port of the upper transmission channel are directed from the upper transmission channel 4 to the public port of the upper transmission channel. Port 4-1 steps raised;

The public port 5-1 of the lower transmission channel is provided with two steps 6-2 of the common port of the lower transmission channel, and the two steps 6-2 of the common port of the lower transmission channel are from the lower transmission channel towards the common port 5- of the lower transmission channel 1 step up;

The low passband port 4-2 of the upper transmission channel is provided with two steps 6-3 of the lower sideband port of the upper transmission channel, and the lower sideband port of the upper transmission channel has two steps 6-3 from the lower passband port of the upper transmission channel 4-2 rises towards the steps in the upper transmission channel 4;

The high-pass band port 4-3 of the upper transmission channel is provided with two steps 6-4 of the upper sideband port of the upper transmission channel; the upper sideband port of the upper transmission channel has two steps 6-4 from the high-pass band port 4- 3 rises towards the steps in the upper transmission channel 4;

The lower passband port 5-2 of the lower transmission channel is provided with two steps 6-5 of the lower sideband port of the lower transmission channel; 5-2 rises toward the step in the lower transmission channel 5;

The high-pass band port 5-3 of the lower transmission channel is provided with two steps 6-6 of the upper side band port of the lower transmission channel; the upper side band port of the lower transmission channel has two steps 6-6 and the high-pass band port 5-3 of the lower transmission channel Steps rise towards the lower transfer channel 5 .

The upper transmission channel partition wall 9 divides the upper transmission channel 4 into an upper transmission channel low-pass band coupling cavity and an upper transmission channel high-pass band coupling cavity. There are several low-pass band tuning screw holes 7-1 of the upper transmission channel between them, and several high-pass band tuning screw holes of the upper transmission channel are opened between the side wall of the main housing and the high-pass band coupling cavity of the upper transmission channel 7-2;

The lower transmission channel partition wall 10 divides the lower transmission channel 5 into a lower transmission channel low-pass band coupling cavity and a lower transmission channel high-pass band coupling cavity, and the side wall of the main housing is connected to the lower transmission channel low-pass band coupling cavity. There are several low-pass band tuning screw holes 8-1 in the lower transmission channel, and several high-pass band tuning screw holes in the lower transmission channel are provided between the side wall of the main housing and the high-pass band coupling cavity of the lower transmission channel. 8-2.

A specific embodiment is given below to illustrate the present invention:

The present invention realizes a Ka-band duplexer integrating two channels, and the technical indicators are as follows:

(1) High-pass frequency range: 33.5-35.5GHz

(2) Low passband frequency range: 36.0-36.7GHz

(3) High-pass band in-band insertion loss: <2.0dB

(4) High-pass in-band return loss: <-15dB

(5) Low passband in-band insertion loss: <2.0dB

(6) Low-pass in-band return loss: <-15dB

(7) High and low passband isolation: >20dB@36.0-36.7GHz

>20dB@33.5-35.5GHz

The proposed dual-channel duplexer is machined from LF21 type rust-resistant aluminum, and its dimensions are 82mm×28mm×10.8mm.

The two common ends adopt non-standard waveguide ports, the size is 7.12mm×2mm, and the distance between centers is 5.5mm;

The two branch ends adopt standard waveguide port, the size is 7.12mm×3.56mm;

The high-pass band adopts a 6-cavity coupling structure. The depth of the 6 cavities is 2.78mm, the width is 7.12mm, the lengths are 4.15mm, 4.74mm, 4.83mm, 4.83mm, 4.75mm, 4.10mm, and the diaphragm thickness is 1mm;

The low-pass band adopts a 4-cavity coupling structure, the depth of the cavity is 2.78mm, the depth of the four cavities is 2.78mm, the width is 7.12mm, the lengths are 5.38mm, 5.77mm, 5.77mm, 5.42mm, and the thickness of the diaphragm is 1mm. ;

The high-pass band tuning screws use 6 M1.6 cylindrical screws;

The low-pass band tuning screw adopts 4 M1.6 cylindrical screws;

The heights of the two steps at the common end are 0.36mm and 0.42mm respectively;

The heights of the two steps at the branch end are 0.37mm and 0.41mm respectively;

The two channels adopt a back-to-back structure, and the thickness of the middle partition is 2.24mm;

The S-parameter performance curves of the high and low passbands of the duplexer realized based on the above structural parameters are shown in Figure 7 and Figure 8 . It can be seen from the performance curve: the frequency range of the low-pass band covers 33.5-35.5GHz, the in-band insertion loss is less than 2dB, the in-band return loss is <-15dB, and the suppression of the high-pass band of 36.0-36.7GHz is greater than 20dB; the frequency range of the high-pass band Covering 36.0-36.7GHz, the in-band insertion loss is less than 2dB, the in-band return loss is <-15dB, and the low-pass band rejection of 33.5-35.5GHz is greater than 20dB. The results meet design expectations. .

The technical means disclosed in the solution of the present invention are not limited to the technical means disclosed in the above technical means, but also include technical solutions composed of any combination of the above technical features.

Inspired by the above-mentioned ideal embodiment according to the present invention, through the above-mentioned description content, relevant workers can make various changes and modifications within the scope of not departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, but must be determined according to the scope of the claims.

Claims (4)

1. A Ka-band dual-channel duplexer suitable for multi-antenna arrays, characterized in that it includes a main housing (1), an upper cover (2) and a lower cover (3), the main housing (1 ) is provided with an upper transmission channel (4) on the side close to the upper cover (2), and a lower transmission channel (5) is provided on the side close to the lower cover (3), and the upper transmission channel (4) and the lower transmission A partition plate is arranged between the passages (5), and two common ports (4-1) of the upper transmission passage and common ports (5-1) of the lower transmission passage are arranged side by side on the side wall of the main housing (1). 1), the common port (4-1) of the upper transmission channel and the common port (5-1) of the lower transmission channel are respectively located on both sides of the partition plate, and the common port (4-1) of the upper transmission channel It communicates with the upper transmission channel (4), and the common port (5-1) of the lower transmission channel communicates with the lower transmission channel (5); Opposite the diagonal line of the common port (4-1) of the upper transmission channel, a low-pass band port (4-2) and a high-pass band port (4-3) of the upper transmission channel are arranged, and the upper transmission channel An upper transmission channel partition wall (9) is arranged between the low-pass band port (4-2) of the upper transmission channel and the high-pass band port (4-3) of the upper transmission channel, and the upper transmission channel partition wall extends to close to the upper transmission channel public port(4-1); On the opposite side of the common port (5-1) of the lower transmission channel, there are a low-pass band port (5-2) and a high-pass band port (5-3) of the lower transmission channel, the lower transmission channel A lower transmission channel partition wall (10) is set between the low-pass band port (5-2) of the lower transmission channel and the high-pass band port (5-3) of the lower transmission channel, and the lower transmission channel partition wall (10) extends to close to the lower The public port of the transmission channel (5-1); The common port (4-1) of the upper transmission channel and the common port (5-1) of the lower transmission channel both adopt narrow-side compressed non-standard interfaces and non-standard flanges, along the thickness direction of the main shell (1) arranged side by side; The common port (4-1) of the upper transmission channel is connected to the low-pass band port (4-2) of the upper transmission channel and the high-pass band port (4-3) of the upper transmission channel through the H-T connector, and the common port of the lower transmission channel (5-1) Connect the low-pass band port (5-2) of the lower transmission channel and the high-pass band port (5-3) of the lower transmission channel through the H-T connector, and the upper transmission channel (4) and the lower transmission channel (5) are both It adopts H-film sheet structure, and adopts non-standard waveguide cavity size with narrow side compression. 2. A Ka-band dual-channel duplexer suitable for multi-antenna arrays according to claim 1, characterized in that the low-pass band port (4-2) of the upper transmission channel, the high-pass band port ( 4-3), the low-pass band port (5-2) of the lower transmission channel and the high-pass band port (5-3) of the lower transmission channel all adopt standard WR28 waveguide interface and non-standard flange. 3. A Ka-band dual-channel duplexer suitable for multi-antenna arrays according to claim 1, characterized in that the common port (4-1) of the upper transmission channel is provided with a common port of the upper transmission channel Two steps (6-1), the two steps (6-1) of the common port of the upper transmission channel rise from the upper transmission channel (4) towards the common port (4-1) of the upper transmission channel; The common port (5-1) of the lower transmission channel is provided with two steps (6-2) for the common port of the lower transmission channel, and the two steps (6-2) of the common port of the lower transmission channel are transmitted from the lower transmission channel towards the lower The common port (5-1) of the channel is stepped up; The low passband port (4-2) of the upper transmission channel is provided with two steps (6-3) of the lower sideband port of the upper transmission channel, and the lower sideband port of the upper transmission channel has two steps (6-3) from the upper transmission channel The low passband port (4-2) of the channel rises towards the step in the upper pass channel (4); The high-passband port (4-3) of the upper transmission channel is provided with two steps (6-4) for the upper sideband port of the upper transmission channel; the two steps (6-4) for the upper sideband port of the upper transmission channel The high-pass band port (4-3) of the step rises towards the middle of the upper transmission channel (4); The low passband port (5-2) of the lower transmission channel is provided with two steps (6-5) of the lower sideband port of the lower transmission channel; the lower sideband port of the lower transmission channel has two steps (6-5) from the lower The low passband port (5-2) of the channel rises towards the step in the lower transmission channel (5); The high-pass band port (5-3) of the lower transmission channel is provided with two steps (6-6) for the upper sideband port of the lower transmission channel; two steps (6-6) for the upper sideband port of the lower transmission channel The high pass band port (5-3) rises towards the step in the lower pass channel (5). 4. A Ka-band dual-channel duplexer suitable for multi-antenna arrays according to claim 1, characterized in that the upper transmission channel partition wall (9) divides the upper transmission channel (4) into upper transmission channels The low-pass band coupling cavity and the upper transmission channel high-pass band coupling cavity, and several low-pass band tuning screw holes (7- 1), there are several high-pass band tuning screw holes (7-2) for the upper transmission channel between the side wall of the main housing and the high-pass band coupling cavity of the upper transmission channel; The lower transmission channel partition wall (10) divides the lower transmission channel (5) into a lower transmission channel low-pass band coupling cavity and a lower transmission channel high-pass band coupling cavity, and the side wall of the main housing is connected to the lower transmission channel low-pass coupling cavity. There are several low-pass band tuning screw holes (8-1) for the lower transmission channel between the coupling cavity, and several lower transmission channels are opened between the side wall of the main housing and the high-pass band coupling cavity of the lower transmission channel The high-pass band tuning screw holes (8-2).