A single-polarized low-gain horn antenna for 5G testing

Abstract

The present invention provides a single-polarization low-gain horn antenna for 5G testing, including a coaxial waveguide converter, a horn tube, and a radio frequency connector. The coaxial waveguide converter is provided with a straight waveguide cavity with one end open, the horn tube is provided with a horn cavity with two ends open, the coaxial waveguide converter is connected to one end of the horn tube, the straight waveguide cavity and the horn cavity form an antenna cavity, the radio frequency connector is provided with a radio frequency end, the radio frequency connector is fixed on the coaxial waveguide converter, the radio frequency end is provided in the straight waveguide cavity, and the gain value of the horn antenna is not greater than 12dBi. The present invention adopts a combination of a coaxial waveguide converter, a horn tube, and a radio frequency connector to form a monopole antenna, which reduces the difficulty of antenna processing. At the same time, the coaxial waveguide converter can cooperate with different horn tubes to achieve a change in gain value and improve the practicality of the monopole antenna.

Description

Technical Field

[0001] The present invention belongs to the field of millimeter wave radio frequency testing, and in particular relates to a single-polarization low-gain horn antenna for 5G testing. Background Art

[0002] 2019 is the first year of 5G. A large number of 5G consumer electronic products are in the R&D verification stage, and their performance needs to be verified urgently. However, the current millimeter wave band test antennas (test frequency is 24GHz~44GHz) are all monopolized by foreign suppliers. As a result, the antennas are expensive and have long delivery times, which cannot cope with the explosive growth of domestic demand. In addition, the existing single-polarization antennas mostly adopt an integrated structure, which makes production difficult. Summary of the invention

[0003] The present invention provides a single-polarization low-gain horn antenna for 5G testing, which reduces the difficulty of producing the antenna.

[0004] The present invention provides a single-polarization low-gain horn antenna for 5G testing, comprising a coaxial waveguide converter, a horn tube, and a radio frequency connector. The coaxial waveguide converter is provided with a straight waveguide cavity with an opening at one end, the horn tube is provided with a horn cavity with openings at both ends, the coaxial waveguide converter is connected to one end of the horn tube, the straight waveguide cavity and the horn cavity form an antenna cavity, the radio frequency connector is provided with a radio frequency end, the radio frequency connector is fixed on the coaxial waveguide converter, the radio frequency end is arranged in the straight waveguide cavity, and the gain value of the horn antenna is not greater than 12dBi.

[0005] Furthermore, the coaxial waveguide converter is provided with a first flange interface, the horn tube is provided with a second flange interface, and the first flange interface is fixedly connected to the second flange interface.

[0006] Furthermore, the coaxial waveguide converter is composed of a first assembly and a second assembly, the first assembly is provided with a slot body with one end open, the straight waveguide cavity is composed of the slot body of the first assembly and the second assembly, and the RF connector is fixed on the second assembly.

[0007] Furthermore, a first gold-plated layer is disposed on a surface of the first assembly facing the second assembly, and a second gold-plated layer is disposed on a surface of the second assembly facing the first assembly.

[0008] Furthermore, the coaxial waveguide converter is provided with a through hole for connecting with a radio frequency connector, the coaxial waveguide converter is provided with a first step surface at the through hole, the radio frequency connector is provided with a second step surface, and the first step surface is in contact and pressed with the second step surface.

[0009] Furthermore, the coaxial waveguide converter also includes a connecting piece, which passes through the first assembly and is fixedly connected to the second assembly. The first assembly is provided with a groove at the connecting piece, and the groove is located on a side of the first assembly facing the second assembly.

[0010] Furthermore, the coaxial waveguide converter also includes an adjusting screw, and the first assembly is provided with a screw through hole with one end connected to the straight waveguide cavity, and the adjusting screw is fixed in the screw through hole.

[0011] Compared with the prior art, the present invention forms a monopole antenna by adopting a combination of a coaxial waveguide converter, a horn tube, and a radio frequency connector, thereby reducing the difficulty of antenna processing. At the same time, the coaxial waveguide converter can be matched with different horns to achieve a change in gain value, thereby improving the practicability of the monopole antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of an embodiment of the present invention;

[0013] Figure 2 It is a schematic diagram of a side cross-sectional structure of an embodiment of the present invention;

[0014] Figure 3 It is a schematic diagram of a top cross-sectional structure of an embodiment of the present invention;

[0015] Figure 4 This is a schematic diagram of the structure of the first assembly according to an embodiment of the present invention;

[0016] Figure 5 This is a gain value test diagram of an embodiment of the present invention;

[0017] Figure 6 is the test value of 24 GHz signal in the embodiment of the present invention;

[0018] Figure 7 It is the test value of 40 GHz signal in the embodiment of the present invention. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0020] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0021] The embodiment of the present invention discloses a single-polarization low-gain horn antenna for 5G testing, such as Figure 1-3 As shown, it includes a coaxial waveguide converter 2, a horn tube 1, and a radio frequency connector 3. The coaxial waveguide converter 2 is provided with a straight waveguide cavity 42 with an opening at one end, and the horn tube 1 is provided with a horn cavity 41 with openings at both ends. The coaxial waveguide converter 2 is connected to one end of the horn tube 1, and the straight waveguide cavity 42 and the horn cavity 41 form an antenna cavity. The radio frequency connector 3 is provided with a radio frequency end, and the radio frequency connector 3 is fixed on the coaxial waveguide converter 2. The radio frequency end is arranged in the straight waveguide cavity 42, and the gain value of the horn antenna is not greater than 12dBi.

[0022] Optional, such as Figure 1-3 As shown, the coaxial waveguide converter 2 is provided with a first flange interface, and the horn tube 1 is provided with a second flange interface, and the first flange interface is fixedly connected to the second flange interface.

[0023] Among them, the first flange interface and the second flange interface are both standard WR28 / UG599 flange interfaces.

[0024] Optional, such as Figure 1-3 As shown, the coaxial waveguide converter 2 is composed of a first assembly 21 and a second assembly 22. The first assembly 21 is provided with a slot body with one end open. The straight waveguide cavity 42 is composed of the slot body of the first assembly 21 and the second assembly 22. The RF connector 3 is fixed on the second assembly 22.

[0025] In particular, such as Figure 1-3 As shown, a first gold-plated layer is disposed on a surface of the first assembly 21 facing the second assembly 22 , and a second gold-plated layer is disposed on a surface of the second assembly 22 facing the first assembly 21 .

[0026] Among them, Figure 1-3 As shown, the coaxial waveguide converter 2 and the horn tube 1 are both made of aluminum alloy. The size of the horn tube mouth is 11.36*8.84mm, and the straight-line distance between the horn tube mouth and the test position of the coaxial waveguide converter 2 is 49.7mm. Figure 5 As shown, the isolation of the horn antenna to 24-40GHz signals is lower than 12dBi, and the length of the horn channel in the horn tube 1 is not more than 20mm.

[0027] The embodiment of the present invention improves the contact effect between the first assembly and the second assembly by using the first gold-plated layer and the second gold-plated layer, thereby ensuring good connectivity between the first assembly and the second assembly. The antenna of the embodiment of the present invention has a small opening size and can be used in a small shielding box. Figure 6 , 7As shown, the antenna can cover the frequency band of 26.5 GHz to 40 GHz, and the standing wave ratio is lower than 1.4.

[0028] Optionally, the coaxial waveguide converter 2 is provided with a through hole for connecting with the RF connector 3, the coaxial waveguide converter 2 is provided with a first step surface at the through hole, the RF connector 3 is provided with a second step surface, and the first step surface is in contact and pressed with the second step surface.

[0029] The coaxial waveguide converter 2 is provided with an inwardly recessed circular first step surface at the through hole, and the surface of the RF connector 3 is provided with an outwardly protruding circular second step surface, and the first step surface matches the second step surface.

[0030] The first step surface and the second step surface of the embodiment of the present invention enable the RF connector and the coaxial waveguide converter to be effectively matched and positioned, and at the same time, the contact surfaces between the RF connector and the coaxial waveguide converter form an interference fit to achieve good contact.

[0031] In particular, such as Figure 4 As shown, the coaxial waveguide converter also includes a connecting piece, which passes through the first assembly 21 and is fixedly connected to the second assembly 22. The first assembly 21 is provided with a groove 221 at the connecting piece, and the groove 221 is located on the side of the first assembly 21 facing the second assembly 22.

[0032] Among them, Figure 4 As shown, the connecting member is a fixing screw, and the first assembly 21 is provided with a groove 221 at the fixing screw insertion position. When installed, the groove 221 is opposite to the second assembly 22.

[0033] The embodiment of the present invention adopts a groove. When the first assembly and the second assembly are tightened, the surface of the first assembly outside the groove is tightly pressed against the second assembly, but the groove of the first assembly still has space for tightening the fixing screw, thereby increasing the pressure on the contact surface and making the contact surface contact better.

[0034] In particular, such as Figure 1-3 As shown, the coaxial waveguide converter 2 further includes an adjusting screw 211. The first assembly 21 is provided with a screw through hole whose one end is connected to the straight waveguide cavity 42. The adjusting screw 211 is fixed in the screw through hole.

[0035] Among them, the adjusting screw adopts a hexagon socket headless screw.

[0036] In the embodiment of the present invention, by using an adjusting screw, when converting a microwave signal from a coaxial to a waveguide, the coupling degree can be changed and the standing wave ratio can be adjusted by adjusting the feeding amount of the screw in the straight waveguide cavity.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that after reading the specification of this application, the technicians can still modify or replace the specific implementation mode of the present invention with equivalents, but these modifications or changes do not deviate from the scope of protection of the pending claims of the present application.

Claims

1. A single-polarization low-gain horn antenna for 5G testing, characterized in that: The horn antenna comprises a coaxial waveguide converter, a horn tube, and a radio frequency connector. The coaxial waveguide converter is provided with a straight waveguide cavity with one end open, the horn tube is provided with a horn cavity with two ends open, the coaxial waveguide converter is connected to one end of the horn tube, the straight waveguide cavity and the horn cavity form an antenna cavity, the radio frequency connector is provided with a radio frequency end, the radio frequency connector is fixed on the coaxial waveguide converter, the radio frequency end is provided in the straight waveguide cavity, and the gain value of the horn antenna is not greater than 12dBi; The coaxial waveguide converter is composed of a first assembly and a second assembly, the first assembly is provided with a slot body with one end open, the straight waveguide cavity is composed of the slot body of the first assembly and the second assembly, and the RF connector is fixed on the second assembly; The coaxial waveguide converter is provided with a through hole for connecting with a radio frequency connector, the coaxial waveguide converter is provided with a first step surface at the through hole, the radio frequency connector is provided with a second step surface, and the first step surface is in contact and pressed with the second step surface; The coaxial waveguide converter further includes an adjusting screw, the first assembly is provided with a screw through hole whose one end is connected to the straight waveguide cavity, and the adjusting screw is fixed in the screw through hole; The coaxial waveguide converter further comprises a connecting member, the connecting member passes through the first assembly and is fixedly connected to the second assembly, the first assembly is provided with a groove at the connecting member, and the groove is located on a side of the first assembly facing the second assembly; The size of the horn tube mouth is 11.36*8.84mm, the straight-line distance between the horn tube mouth and the coaxial waveguide converter test position is 49.7mm, and the length of the horn channel in the horn tube 1 is not more than 20mm.

2. A single-polarization low-gain horn antenna for 5G testing according to claim 1, characterized in that: The coaxial waveguide converter is provided with a first flange interface, and the horn tube is provided with a second flange interface, and the first flange interface is fixedly connected to the second flange interface.

3. A single-polarization low-gain horn antenna for 5G testing according to claim 1, characterized in that: A first gold-plated layer is disposed on a surface of the first assembly facing the second assembly, and a second gold-plated layer is disposed on a surface of the second assembly facing the first assembly.

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