An ultra-wideband aperture reconfigurable direction-finding array antenna

Abstract

The invention discloses an ultra-wideband aperture reconfigurable direction-finding array antenna, which belongs to the field of radio direction-finding technology. The antenna includes an antenna unit and a frame structure for installing the antenna unit; the frame structure includes an outer frame, and the outer frame is provided with a longitudinal adjustment rod moving along its longitudinal pressure plate and a transverse adjustment rod along its transverse pressure plate; the outer frame is rectangular, and multiple transverse adjustment rods and longitudinal adjustment rods are provided; the antenna unit is located in a square frame formed by two adjacent transverse adjustment rods and two adjacent longitudinal adjustment rods. The invention has the characteristics of good broadband performance, flexible and adjustable performance, and simple system composition, and is suitable for use as a small ground station or vehicle-mounted station antenna.

Description

Technical Field

[0001] The invention relates to the technical field of radio direction finding, and in particular to an ultra-wideband aperture reconfigurable direction finding array antenna. Background Art

[0002] Radio direction finding is a science closely related to radio engineering, radio science, radio communication technology, computer technology and digital technology. It is an irreplaceable technical means and important content in many important scientific fields of radio navigation and positioning, urban radio communication management, and radio communication reconnaissance in electronic countermeasures.

[0003] Radio direction finding is mainly concerned with determining the geographical location of radio wave radiation sources. It is a process of using radio measurement equipment to determine the angle (or direction angle) between the line connecting the radio radiation source to the observation point and a reference direction by means of the propagation characteristics of radio waves. All system equipment used to complete the above process mainly includes direction finding antennas, input matching networks, receivers, direction finding parameter processors and direction indication output devices, collectively referred to as radio direction finding systems.

[0004] The performance of the direction-finding antenna directly determines the performance of the radio direction-finding system. In the wide-aperture direction-finding system of the linear antenna array, there are several forms of two-dimensional linear array antennas that can achieve ultra-wideband. Although they have their own characteristics in performance, they all have certain shortcomings:

[0005] 1) Conventional ultra-wideband two-dimensional linear antenna array. It uses ultra-wideband units, but the spacing is fixed, which makes it difficult to simultaneously meet the direction-finding antenna performance requirements of the entire frequency band, and the broadband characteristics are poor.

[0006] 2) Multi-band two-dimensional linear antenna array. In order to realize multi-band high-performance direction-finding antenna, a multi-layer direction-finding antenna layout structure is often used. The array element spacing is designed according to the corresponding frequency band. Since more antenna units and corresponding supporting structures are required, the volume is large, the cost is high, and the structure is complex, which is not conducive to the concealed design of the antenna. Summary of the invention

[0007] In view of this, the present invention provides an ultra-wideband aperture reconfigurable direction-finding array antenna. The antenna has the characteristics of good broadband performance, flexible and adjustable performance, and simple system composition, and is suitable for use as a small ground station or vehicle-mounted station antenna.

[0008] In order to achieve the above object, the technical solution adopted by the present invention is:

[0009] An ultra-wideband aperture reconfigurable direction-finding array antenna comprises an antenna unit and a frame structure for mounting the antenna unit; the frame structure comprises an outer frame, a longitudinal adjustment rod moving along a longitudinal pressure plate thereof and a transverse adjustment rod moving along a transverse pressure plate thereof are arranged inside the outer frame; the outer frame is rectangular, and a plurality of transverse adjustment rods and a plurality of longitudinal adjustment rods are arranged; the antenna unit is located in a square frame formed by two adjacent transverse adjustment rods and two adjacent longitudinal adjustment rods.

[0010] Furthermore, the outer frame includes two transverse pressing plates and two longitudinal pressing plates fixedly connected at the ends, and the transverse pressing plates and the longitudinal pressing plates are perpendicular; sliding grooves are provided in the middle positions of the transverse pressing plates and the longitudinal pressing plates, and the two ends of the transverse adjustment rod are respectively located in the sliding grooves of the two transverse pressing plates and can move along the sliding grooves of the transverse pressing plates, and the two ends of the longitudinal adjustment rod are respectively located in the sliding grooves of the two longitudinal pressing plates and can move along the sliding grooves of the longitudinal pressing plates.

[0011] Furthermore, each of the square frames is provided with a mounting block for mounting the antenna unit.

[0012] Furthermore, the number of the transverse adjustment rods and the longitudinal adjustment rods are both positive even numbers.

[0013] Furthermore, both ends of the transverse adjustment rod and the longitudinal adjustment rod are provided with fastening nails, the nail body of the fastening nail passes through the sliding groove, and the nail head of the fastening nail and the adjustment rod are located on the opposite sides of the sliding groove.

[0014] Furthermore, the transverse pressing plate and the longitudinal pressing plate are both provided with scales.

[0015] The beneficial effects of the above technical solution of the present invention are:

[0016] 1) The present invention is provided with a transverse adjustment rod and a longitudinal adjustment rod, which can adjust the spacing of the array antenna, realize the need for different spacings of the direction-finding antenna units when working at different frequencies, and ensure the direction-finding performance of the antenna within the ultra-wideband.

[0017] 2) The present invention adjusts the number of adjustment rods to achieve the adjustable and expandable number of direction-finding antenna units, thereby improving the performance of the linear direction-finding antenna array. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0019] Figure 2 It is a schematic diagram of the structure after the adjustment rod is adjusted in the embodiment of the present invention.

[0020] In the figure: 1, main frame; 2, transverse pressure plate; 3, longitudinal pressure plate; 4, transverse adjustment rod; 5, longitudinal adjustment rod; 6, fastening nail; 7, mounting block; 8, antenna unit. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Reference Figure 1 , this embodiment includes a main frame 1, 2 groups of transverse pressing plates 2, 2 groups of longitudinal pressing plates 3, 4 groups of transverse adjustment rods 4, 4 groups of longitudinal adjustment rods 5, 16 fastening nails 6, 16 mounting blocks 7 and 16 antenna units 8. The main frame 1 adopts a rectangular frame structure, the 2 groups of transverse pressing plates 2 and the 2 groups of longitudinal pressing plates 3 are fixed on the four frames of the main frame 1, the two ends of the 4 groups of longitudinal adjustment rods 5 are fixed between the 2 groups of longitudinal pressing plates 3 and the main frame 1, the two ends of the 4 groups of transverse adjustment rods 4 are fixed between the 2 groups of transverse pressing plates 2 and the main frame 1, 4×4 mounting blocks 7 are located at the overlapping part of a group of transverse adjustment rods 4 and a group of longitudinal adjustment rods 5, and an antenna unit 8 is fixed on each mounting block 7. The two ends of each group of transverse adjustment rods 4 are fixed between the main frame 1 and the transverse pressing plate 2 with fastening nails 6, and the two ends of each group of longitudinal adjustment rods 5 are fixed between the main frame 1 and the longitudinal pressing plate 3 with fastening nails 6. The antenna unit 8 is connected to the external receiving and transmitting equipment through a cable. The transverse pressing plate and the longitudinal pressing plate are both provided with scales.

[0024] Reference Figure 2 The specific operation of adjusting the spacing is completed as follows: loosen the fastening nails so that the adjustment rod can slide in the gap between the main frame and the pressure plate, first adjust the transverse adjustment rod, adjust it to the specified spacing, and then tighten the fastening nails. At this time, the transverse adjustment rod is fixed to complete the transverse spacing adjustment; use the same method to adjust the longitudinal adjustment rod to the specified spacing, and tighten it to complete the longitudinal spacing adjustment.

[0025] The working principle of the present invention is as follows: the ultra-wideband aperture reconfigurable direction-finding array antenna operates in a wider frequency band, and the spacing between antenna units in the antenna is adjustable. When the planar array antenna operates in a higher frequency band, the required spacing is smaller. At this time, the array antenna is adjusted as follows: Figure 1 When the planar array antenna operates in a lower frequency band, a larger spacing is required. In this case, the array antenna is adjusted as follows: Figure 2 After adjusting the array element spacing, multiple antenna units form an array element spacing corresponding to the transmit and receive frequency band, and then simultaneously receive signals from space or transmit signals to space, so that the antenna works in a state of good antenna performance.

[0026] In summary, the lateral adjustment rod and the longitudinal adjustment rod of the ultra-wideband aperture reconfigurable direction-finding array antenna of the present invention can change the distance between antenna units of different frequency bands by adjusting, thereby realizing different direction-finding baseline spacings required by different frequency bands of the ultra-wideband direction-finding antenna. The antenna has the characteristics of good broadband performance, flexible and adjustable performance, and simple system composition, and is suitable for use as a small ground station or vehicle-mounted station antenna.

Claims

1. An ultra-wideband aperture reconfigurable direction-finding array antenna, comprising an antenna unit, characterized in that: It also includes a frame structure for installing the antenna unit; the frame structure includes an outer frame, and a longitudinal adjustment rod moving along the longitudinal pressure plate and a transverse adjustment rod moving along the transverse pressure plate are provided in the outer frame; the outer frame is rectangular, and a plurality of transverse adjustment rods and longitudinal adjustment rods are provided; the antenna unit is located in a square frame formed by two adjacent transverse adjustment rods and two adjacent longitudinal adjustment rods; The outer frame includes two transverse pressing plates and two longitudinal pressing plates, and the ends of the transverse pressing plates are connected to the ends of the longitudinal pressing plates; sliding grooves are provided in the middle positions of the transverse pressing plates and the longitudinal pressing plates, and the two ends of the transverse adjustment rod are respectively located in the sliding grooves of the two transverse pressing plates and can move along the sliding grooves of the transverse pressing plates, and the two ends of the longitudinal adjustment rod are respectively located in the sliding grooves of the two longitudinal pressing plates and can move along the sliding grooves of the longitudinal pressing plates; The square frames are each provided with a mounting block for mounting the antenna unit.

2. The ultra-wideband aperture reconfigurable direction-finding array antenna according to claim 1, characterized in that: The number of the transverse adjustment rods and the longitudinal adjustment rods are both positive numbers.

3. The ultra-wideband aperture reconfigurable direction-finding array antenna according to claim 1, characterized in that: Both ends of the transverse adjustment rod and the longitudinal adjustment rod are provided with fastening nails, the nail bodies of the fastening nails pass through the sliding grooves, and the nail heads of the adjustment rod and the fastening nails are respectively located on the different sides of the sliding grooves.

4. The ultra-wideband aperture reconfigurable direction-finding array antenna according to claim 1, characterized in that: The transverse pressing plate and the longitudinal pressing plate are both provided with scales.

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