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Broadband balun structure with phase adjusting function

A phase adjustment, broadband technology, applied in the structural form of the radiating element, the structural connection of the antenna grounding switch, the specific array feeding system, etc., can solve the problems of large insertion loss, high cost, and high unit price of the phase shifter. The effect of small insertion loss, low overall cost and simple structure

Pending Publication Date: 2020-12-18
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the entire array, using two devices at the same time will have the disadvantages of large structural complexity, large volume, and large insertion loss
And the unit price of the phase shifter is expensive, which means that the cost of the whole design will be very high

Method used

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  • Broadband balun structure with phase adjusting function
  • Broadband balun structure with phase adjusting function
  • Broadband balun structure with phase adjusting function

Examples

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the accompanying drawings and examples. It should be understood that the following examples are intended to facilitate the understanding of the present invention, and have no limiting effect on it.

[0034] see Figure 1-2 As shown, the broadband tapered balun with phase shifting function in Embodiments 1 and 2 of the present invention includes a metal floor 1 , a dielectric plate 2 and a balun radiation structure 3 .

[0035] The metal floor 1 is a metal structure printed on the bottom surface of the dielectric board, and the floor should retain via holes for connecting the varactor diodes contained in the radiation structure and the ground.

[0036] The dielectric plate 2 is a dielectric material with a dielectric constant ε ranging from 1 to 100. A conductive through-hole structure is loaded therein, and the radius of the conductive through-hole structure is denoted as Rk.

[0037] The balun ...

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Abstract

The invention discloses a broadband balun structure with a phase adjustment function. The whole structure can be a two-layer or three-layer printed circuit board structure, the bottom layer is a printed metal floor, the middle layer is a dielectric substrate, and the upper layer is a printed microstrip line radiation structure, a loading varactor, a capacitor and an inductor. The radiation structure is a gradient microstrip line or a folding microstrip line. The antenna is fed by a coaxial line, and joint welding and feeding are performed on the side surfaces of the two ends of the dielectricplate. Double varactors are loaded between the radiation microstrip line and the ground, and the capacitance value of the varactors is adjusted by controlling the voltage, so that the phase shift function of the broadband balun is realized.

Description

technical field [0001] The invention belongs to the field of microwave devices, in particular to a broadband balun structure with a phase adjustment function, which is composed of a broadband balun and a varactor diode. On the basis of realizing the impedance conversion function in a broadband, a broadband balun structure using a varactor diode for phase adjustment . Background technique [0002] In the traditional phased array system, if the antenna unit is an antenna type with unbalanced feed, the antenna array only needs to use a phase shifter to realize the scanning function; and if the antenna unit is an antenna type with balanced feed, the antenna unit On the basis of realizing the scanning function of the antenna array through the phase shifter, the balun is also required to provide balanced feed for it. In this case, both the balun and the phase shifter need to be used at the same time. For the entire array, using two devices at the same time will have the disadvant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q3/36H01Q5/314H01Q1/50H01Q21/00H01Q1/38H01Q1/48
CPCH01Q1/38H01Q1/48H01Q1/50H01Q3/36H01Q21/0006H01Q5/314
Inventor 吴琦王阳
Owner BEIHANG UNIV
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