A Waveguide-Microstrip Transition Structure Based on V-type Antenna
A transitional structure and waveguide technology, applied in waveguide devices, circuits, connection devices, etc., can solve problems such as inconsistent output interfaces and large device sizes, achieve less return loss, increase coupling rate, and enhance out-of-band suppression capabilities Effect
Active Publication Date: 2022-07-29
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology
[0006] The purpose of the present invention is to provide a waveguide-microstrip transition structure based on a V-shaped antenna to solve the problems of inconsistent input and output interfaces and large device sizes caused by 90° bending of the existing transition structure.
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Embodiment 1
[0028] This embodiment provides a waveguide-microstrip transition structure based on a V-shaped antenna, and the transition structure works in the frequency band of 109-119 GHz. The structure is as follows figure 1 , figure 2 , image 3 As shown, it includes: an input WR-10 waveguide 1, a narrow-edge widened waveguide 2, a rectangular cavity and a chip cavity 7 for cascading subsequent chips, which are arranged in sequence along the output direction. A substrate 4 is arranged in the rectangular cavity. After the substrate is placed in the rectangular cavity, the area of the bottom end of the rectangular cavity is smaller than that of the substrate, which enhances the bearing capacity of the substrate 4 and reduces the transmission loss to the on-chip antenna. The substrate 4 is a Rogers RT / duroid 5880(tm) substrate with a thickness of 0.127 mm.
[0029] The front surface of the substrate 4 is provided with an antenna structure 9 . The antenna structure 9 is composed of t...
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Abstract
The invention belongs to the technical field of millimeter wave device design, in particular to a waveguide-microstrip transition structure based on a V-shaped antenna. It includes: an input waveguide, a narrow-edge widened waveguide, a rectangular cavity, and a chip cavity for cascading subsequent-stage chips, which are arranged in sequence along the output direction. Through the V-shaped antenna structure on the front side of the substrate, the energy propagating from the input waveguide is coupled into the coplanar stripline structure on the back side of the substrate, and the transmission microstrip line in the coplanar stripline structure controls the electromagnetic waves in the coplanar stripline structure. transmission. Since the edge of the grounding microstrip line towards the transmission microstrip line is a logarithmic curve, with the grounding hole, the direction of the electric field is directed vertically from the microstrip line to the grounding hole, and finally the electromagnetic wave energy propagates into the chip cavity with the same width as the chip with low energy loss. Complete the transition between waveguide and microstrip. Compared with the prior art, the input and output interfaces of the present invention are on the same level, which avoids the problems of inconsistent input and output interfaces, large volume and the like existing in the traditional transition structure.
Description
technical field [0001] The invention belongs to the technical field of millimeter wave device design, and in particular relates to a waveguide-microstrip transition structure based on a V-shaped antenna. Background technique [0002] Millimeter wave (millimeter wave): an electromagnetic wave with a wavelength of 1 to 10 millimeters. It is located in the wavelength range where microwaves and far-infrared waves overlap, so it has the characteristics of both spectrums. It has the following advantages: [0003] Extremely wide bandwidth: It is generally considered that the millimeter wave frequency range is 26.5-300GHz, and the bandwidth is as high as 273.5GHz; the beam is narrow: the beam of the millimeter wave is much narrower than that of the microwave under the same antenna size. Compared with lasers, the propagation of millimeter waves is much less affected by climate and can be considered to have all-weather characteristics; compared with microwaves, the size of millimeter-...
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IPC IPC(8): H01P5/107
Inventor 张勇曹天豪曾晓楠夏雷
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA