CN103762425B - Dual-frequency dual-circular-polarization common-aperture antenna array for two-dimensional phase-controlled scanning - Google Patents

Abstract

A dual-frequency dual-circular-polarization common-aperture antenna array for two-dimensional phase-controlled scanning covers a Ka frequency band and a Ku frequency band. In the overlapping part of the two frequency bands, the basic composition unit of the antenna array is that 8 Ka frequency band metal radiating sheets surround 1 Ku frequency band metal radiating sheet; at the edge part, the distance between Ku frequency band metal radiation pieces needs to be adjusted to form an array with compact layout, which can effectively reduce side lobes and inhibit grating lobes; the metal radiation sheets with different polarization modes are adopted by the antennas with different frequency bands to form double circular polarization, so that the polarization isolation of the common-caliber antenna is improved. The two frequency band antennas Ka and Ku are integrated in the same caliber through reasonable layout, the mutual influence is reduced to the minimum by means of array optimization, polarization isolation and the like, and the two-dimensional phased array antenna system is suitable for various two-dimensional phased array antenna systems with low requirements on sections and compact structures and realizes two-dimensional phase scanning at a large scanning angle.

Description

A Dual Frequency Dual Circular Polarization Co-Aperture Antenna Array for Two-Dimensional Phased Scanning

technical field

The invention relates to a dual-frequency dual-circular polarization common-aperture antenna array for two-dimensional phase-controlled scanning, which belongs to the technical field of antennas.

Background technique

In order to meet the requirements of low profile, compact structure and large scanning angle in the two-dimensional phased array antenna system, the common-aperture antenna array has become a trend. The common-aperture antennas widely used at home and abroad are not specifically designed for two-dimensional phased array antennas, but most of the common-aperture antennas use waveguide slot antennas or stacked structures to achieve common aperture, and the polarization forms are linear polarization.

The patented dual-band dual-polarization common-aperture antenna (CN201120122507.6), the common-aperture variable-beamwidth waveguide slot array antenna (CN201210011667.2), and the common-aperture antenna involved in a planar waveguide slot array antenna (CN201020695361.X) are all It is a waveguide slot antenna, and the polarization form is linear polarization. The common-aperture antenna in the L/S/X three-band dual-polarization planar antenna array (CN201010275940.3) and the S/X dual-band dual-polarization shared aperture microstrip vibrator and dielectric resonator array antenna (CN200910198240.6) is not involved to higher frequencies, and adopts a multi-layer laminated structure. A dual-band broadband corrugated horn feed antenna (CN201110198475.2) involves a corrugated horn antenna.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art and provide a low-profile, compact, dual-band, dual-circularly polarized, common-aperture antenna suitable for large scanning angles, which can be used for a variety of two-dimensional phased array antennas system.

Technical solution of the present invention is:

A dual-frequency dual-circular polarization common-aperture antenna array for two-dimensional phased scanning, comprising: a microwave dielectric substrate, a Ka-band metal radiator, a Ku-band metal radiator, and a connector;

The antenna array covers the Ka frequency band and the Ku frequency band, and the Ka frequency band metal radiator and the Ku frequency band metal radiator are distributed on the microwave dielectric substrate, the overlapping part of the two frequency bands in the middle area, and the evenly distributed Ku frequency band in the edge part Metal radiators, in the overlapping part of the two frequency bands, the basic components of the antenna array include a Ka-band metal radiator and a Ku-band metal radiator. The Ka-band metal radiators are distributed in a square shape, and a Ku-band surrounds the center. Frequency-band metal radiators; the bottom of each Ka-band metal radiator and Ku-band metal radiator is connected to a radio frequency component through a connector through a microwave dielectric substrate to form a tile-type two-dimensional phased array antenna.

Both the Ka-band metal radiator and the Ku-band metal radiator are square.

The distance between two adjacent Ka-band metal radiators is not more than 0.5 times the Ka-band wavelength,

The distance between two adjacent Ku-band metal radiators at the edge part is not greater than 0.43 times the Ku-band wavelength.

The advantage of the present invention compared with prior art is:

(1) The present invention integrates Ka and Ku frequency band antennas into the same caliber through reasonable layout, and uses array optimization, polarization isolation and other means to minimize mutual influence, and is applicable to a variety of low-profile and structural requirements In a compact two-dimensional phased array antenna system, two-dimensional phase scanning with a large scanning angle is realized.

(2) Through reasonable layout of the antenna edge, side lobes can be effectively reduced and grating lobes can be suppressed, especially in the case of large scanning angles;

Description of drawings

Fig. 1 is a top view of the basic constituent elements of the antenna array of the present invention;

Fig. 2 is a top view of the antenna array of the present invention;

Fig. 3 is a side view of the antenna array of the present invention.

detailed description

The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

The invention provides a dual-frequency dual-circular polarization common-aperture antenna array for two-dimensional phase-controlled scanning. The Ka and Ku frequency band antennas are integrated into the same aperture through a reasonable layout, and array optimization, polarization Isolation and other means minimize the mutual influence, and can be applied to a variety of two-dimensional phased array antenna systems that require low profile and compact structure, and realize two-dimensional phase scanning with a large scanning angle.

As shown in Figure 2 and Figure 3, it includes: microwave dielectric substrate 1, Ka-band metal radiator 2, Ku-band metal radiator 3 and connector 4; Ka-band metal radiator 2 and Ku-band metal radiator 3 are both square.

The microwave dielectric substrate 1 is a double-sided copper-clad microwave dielectric board. The upper surface of the dielectric board is etched to form a required antenna array, and the lower surface directly contacts the floor. The two frequencies covered by the antenna are the Ka band and the Ku band.

The antenna array covers the Ka frequency band and the Ku frequency band, and the Ka frequency band metal radiation sheet 2 and the Ku frequency band metal radiation sheet 3 are distributed on the microwave dielectric substrate 1, which is the overlapping part of the two frequency bands in the middle area and uniform in the edge part. The Ku-band metal radiator 3 distributed in the overlapping part of the two frequency bands, as shown in Figure 1, the basic components of the antenna array include 8 Ka-band metal radiators 2 and 1 Ku-band metal radiator 3, the Eight Ka-band metal radiators 2 are distributed in a square shape, and a Ku-band metal radiator 3 surrounds the center, which is equivalent to 9 Ka-band metal radiators forming a 3*3 array, and then the middle radiator is replaced with a Ku-band Metal radiation sheet; the bottom of each Ka-band metal radiation sheet 2 and Ku-band metal radiation sheet 3 penetrates through the microwave dielectric substrate 1 through a connector 4 and is connected to a radio frequency component to form a tile-type two-dimensional phased array antenna.

The distance between two adjacent Ka-band metal radiators 2 is not greater than 0.5 times the Ka-band wavelength, and the distance between two adjacent Ku-band metal radiators (3) at the edge is not greater than 0.43 times the Ku-band wavelength , forming an array with a tight layout, which can effectively reduce side lobes and suppress grating lobes.

Different frequency band antennas adopt metal radiators with different polarization modes to form dual circular polarization, which improves the polarization isolation of the common-aperture antenna.

The parts not described in detail in the present invention belong to the well-known technology in the art.

Claims (2)

1., for a dual-band dual-circular polarization common reflector battle array for two dimensional phased scanning, it is characterized in that comprising: microwave dielectric substrate (1), Ka frequency range metal radiation sheet (2), Ku frequency range metal radiation sheet (3) and connector (4);

Described antenna array covers Ka frequency range and Ku frequency range, Ka frequency range metal radiation sheet (2) and Ku frequency range metal radiation sheet (3) are distributed in microwave dielectric substrate (1), at the overlapping part that central region is two frequency ranges, it is uniform Ku frequency range metal radiation sheet (3) in marginal portion, at the overlapping part of two frequency ranges, the basic composition unit of aerial array comprises 8 Ka frequency range metal radiations sheet (2) and 1 Ku frequency range metal radiation sheet (3), these 8 Ka frequency range metal radiation sheet (2) distributions are in square, around 1 Ku frequency range metal radiation sheet (3) at center, all penetrating microwave dielectric substrate (1) by connector (4) is connected a radio frequency component below for each Ka frequency range metal radiation sheet (2) and Ku frequency range metal radiation sheet (3), forms tile type two dimensional phased array antenna,

Spacing between two adjacent Ka frequency range metal radiations sheet (2) is not more than the Ka band wavelength of 0.5 times, and the spacing between Ku frequency range metal radiation sheet (3) that two, marginal portion is adjacent is not more than 0.43 times of Ku band wavelength.

2. antenna array according to claim 1, is characterized in that: described Ka frequency range metal radiation sheet (2) and Ku frequency range metal radiation sheet (3) are square.