CN112038759A

CN112038759A - Ultra-wideband multi-channel integrated horn antenna

Info

Publication number: CN112038759A
Application number: CN202011010074.5A
Authority: CN
Inventors: 沈荣; 刘云; 孙丹
Original assignee: Leihua Electronic Technology Research Institute Aviation Industry Corp of China
Current assignee: Leihua Electronic Technology Research Institute Aviation Industry Corp of China
Priority date: 2020-09-23
Filing date: 2020-09-23
Publication date: 2020-12-04

Abstract

The application provides an ultra wide band multichannel integrated form horn antenna, include: the antenna comprises a slotted radiator array, a plurality of radiating units and a plurality of radiating units, wherein the slotted radiator array comprises a plurality of radiating units which are arranged according to a rectangular array, and each radiating unit is provided with a matching port, a feed slot line and a gradual change metal slot; the excitation waveguide is used for loading the slotted radiator array, so that the slotted radiator array is arranged in the excitation waveguide; an open horn disposed at a front end of the excitation waveguide; and a coaxial connector passing through the rear end of the excitation waveguide and connected to the feed slot line of the radiator unit, transmitting the excitation signal to the slotted radiator array through the coaxial connector, forming a transmission signal in the excitation waveguide, and performing spatial synthesis and transmission through the open-ended horn. The ultra-wideband multi-channel integrated horn antenna provided by the application can omit a complex feed network, greatly simplifies the process, reduces the cost, has more excitation channels and space synthesis, and can greatly reduce the volume and weight of a transmitter.

Description

Ultra-wideband multi-channel integrated horn antenna

Technical Field

The application belongs to the technical field of microwave/millimeter wave antennas, and particularly relates to an ultra wide band multi-channel integrated horn antenna.

Background

Some microwave systems have high power requirements, and the high power inevitably causes the transmitter to have large volume and heavy weight, and cannot meet the requirements of the systems on the volume and the weight, thereby causing the irreconcilable contradiction. Therefore, many researchers adopt a mode of synthesizing a plurality of low-power transmitters, so that the requirement of high-power transmission is met, and the purpose of greatly reducing the volume and the weight of the transmitters is achieved. This puts a demand on the antenna to have multiple channels for power excitation and thus power spatial synthesis.

Complex phased array antennas are clearly unsuitable for such high power microwave systems, given the requirements of reduced cost and simplified system. And the ultra-wideband phased array antenna system is difficult to realize, and is still a technical problem internationally at present. Therefore, it is necessary to improve the architecture design of the system and utilize the power space synthesis function of the array antenna to realize high-power electromagnetic wave radiation.

Disclosure of Invention

It is an object of the present application to provide an ultra-wideband multi-channel integrated feedhorn to solve or mitigate at least one of the problems of the background art.

The technical scheme of the application is as follows: an ultra-wideband multi-channel integrated feedhorn, the integrated feedhorn comprising:

the antenna comprises a slotted radiator array, a plurality of radiating units and a plurality of radiating units, wherein the slotted radiator array comprises a plurality of radiating units which are arranged according to a rectangular array, and each radiating unit is provided with a matching port, a feed slot line and a gradual change metal slot;

an excitation waveguide for carrying the slotted radiator array such that the slotted radiator array is disposed inside the excitation waveguide;

an open horn disposed at a front end of the excitation waveguide; and

and the coaxial connector penetrates through the rear end of the excitation waveguide and is connected to the feed slot line of the radiator unit, the excitation signal is transmitted to the slotted radiator array through the coaxial connector, a transmitting signal is formed in the excitation waveguide, and the transmitting signal is spatially synthesized and transmitted through the open-ended horn.

Preferably, the radiator units are connected to a separate transmitter by a coaxial connector.

Preferably, the matching port, the feed slot line, and the tapered metal slot of the radiator element are integrally formed by machining.

Preferably, the tapered metal groove becomes gradually wider along the expanding direction of the open horn.

Preferably, a short-circuit plate is arranged at the rear end of the excitation waveguide.

The ultra-wideband multi-channel integrated horn antenna provided by the application is connected with the excitation waveguide through the open horn, so that the area of the radiation aperture is increased, the antenna gain is improved, a complex feed network can be omitted, the process is simplified to a great extent, and the cost is reduced; meanwhile, because more excitation channels are provided, the provided plurality of transmitters are excited to further achieve the space synthesis of the transmitting power, the volume weight of the transmitters can be greatly reduced, the cost is reduced, and a design space is provided.

Drawings

In order to more clearly illustrate the technical solutions provided by the present application, the following briefly introduces the accompanying drawings. It is to be expressly understood that the drawings described below are only illustrative of some embodiments of the invention.

Fig. 1 is a schematic structural diagram of an ultra-wideband multichannel integrated horn antenna of the present application.

Fig. 2 is a schematic diagram of a slotted radiator array of the present application.

Fig. 3 is a schematic view of the structure of the radiator unit of the present application.

Reference numerals:

1-radiator unit, 11-radiator matching port, 12-feeder slot, 13-gradient metal slot;

2-excitation waveguide, 21-short circuit board;

3-coaxial connector, 31-inner conductor.

Detailed Description

In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application.

In order to overcome the problem of irreconcilable contradiction between transmitter power and volume in the prior art, the application provides an ultra-wideband multichannel integrated high-power horn antenna.

Specifically, referring to the perspective structure diagram of the ultra-wideband multichannel integrated horn antenna shown in fig. 1 and fig. 2, the ultra-wideband multichannel integrated horn antenna mainly includes a slotted radiator array formed by a plurality of radiator units 1, an excitation waveguide 2, an open-ended horn 4, and a coaxial connector 3.

As shown in fig. 3, the radiator unit 1 is substantially in the shape of a plate having a certain thickness, and has a radiator matching opening 11, a feed slot line 12, and a tapered metal slot 13, and the radiator matching opening 11, the feed slot line 12, and the tapered metal slot 13 are communicated with each other.

In the preferred embodiment of the present application, the radiator matching port 11, the feed slot line 12, and the tapered metal slot 13 of the radiator element 1 are integrally formed by machining or other means.

The excitation waveguide 2 is used to house a slotted radiator array of radiator units 1, which is disposed inside the excitation waveguide 2. Typically, the physical dimensions or configuration of the slotted radiating array correspond to the dimensions of the interior of the excitation waveguide 2 for receiving it.

The open horn 4 is a main radiation component, and is disposed at the front end (left side) of the excitation waveguide 2 to increase the radiation aperture area and improve the antenna gain. The open-ended horn 4 gradually expands from the excitation waveguide 2 outward along the X direction, and the gradual change direction of the gradual change metal slot 13 in the radiator unit 1 is consistent with the expansion direction of the open-ended horn 4 and also gradually expands along the X direction. It will be appreciated that the size of the open horn 4 can be adjusted according to the power to be radiated.

The inner conductor 31 of one end of the coaxial connector 3 extends into the excitation waveguide 2 and is connected with the feed slot line 12 of the radiator unit 1 to complete feeding, and the other end of the coaxial connector 3 is used for connecting a transmitter. An excitation signal transmitted by the transmitter is transmitted to the radiator units 1 through the coaxial connector, a plurality of radiator units 1 form a transmission signal with larger power in an array mode in the excitation waveguide 2, and the transmission signal is subjected to space power synthesis through the open horn 4 at the front end of the excitation waveguide 2 and is transmitted.

In the present application, the rear end of the excitation waveguide 2 is provided with a short-circuiting plate 21, which prevents the generated excitation signal from being transmitted backward (right).

In a preferred embodiment of the present application, each radiator unit 1 in the slotted radiator array is connected to a separate transmitter by a coaxial connector, and the radiator units 1 are independently controlled by the separate transmitters.

The ultra-wideband multi-channel integrated high-power horn antenna provided by the application is connected with the excitation waveguide 2 through the open horn 4 to form an increased radiation aperture area, so that the antenna gain is improved, a complex feed network can be omitted, the process is simplified to a great extent, and the cost is reduced. Meanwhile, the slotted radiator array is provided with a plurality of excitation channels, so that a plurality of transmitters can be excited to achieve spatial synthesis of transmission power, a design space is provided for greatly reducing the volume weight and the cost of the transmitters, a feed network is omitted under the same caliber, the structural complexity is simplified, and the process cost is reduced

The method and the device effectively solve the problems of overlarge volume weight and overhigh cost of the transmitter caused by the large power of the transmitter at the front end of the radio frequency of the radar, provide a plurality of excitation channels for the transmitter, and allow the transmitter to realize power space synthesis by adopting a plurality of small power modules. The antenna is particularly suitable for the radio frequency system antenna with high transmission power and strict weight limitation.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An ultra-wideband multi-channel integrated feedhorn, the integrated feedhorn comprising:

an open horn disposed at a front end of the excitation waveguide; and

2. The ultra-wideband multi-channel integrated feedhorn of claim 1, wherein the radiator units are connected to separate transmitters by coaxial connectors.

3. The ultra-wideband multi-channel integrated feedhorn of any one of claims 1 or 2, wherein the matching port, the feed slot line and the tapered metal slot of the radiator element are integrally formed by machining.

4. The ultra-wideband multi-channel integrated feedhorn of claim 3, wherein the tapered metal slot widens progressively along the direction of expansion of the open horn.

5. The ultra-wideband multi-channel integrated feedhorn of claim 1, wherein a shorting plate is provided at a rear end of the excitation waveguide.