W-band broadband mixer

A mixer and broadband technology, which is applied in the field of millimeter wave devices, can solve problems such as unsatisfactory performance and insufficient bandwidth, and achieve good impedance matching characteristics, reduce reflection, and improve utilization.

Inactive Publication Date: 2012-03-28
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen that not only the bandwidth is not wide enough, but also its performance is not ideal

Method used

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Embodiment Construction

[0021] figure 1 It is a structural schematic diagram of a specific embodiment of the present invention, and the broadband mixer circuit structure is fabricated on an RT5880 substrate with a thickness of 0.127 mm. figure 2 It is a schematic diagram of the front structure of the mixing circuit in the W-band broadband mixer provided by the present invention. image 3 It is a schematic diagram of the rear structure of the mixing circuit in the W-band broadband mixer provided by the present invention.

[0022] From the fin line transition structure to the slot line structure at the local oscillator end, a rectangular slit A3 is introduced at the end of the fin line transition structure. produce a matching effect. Two rectangular slits A1 are introduced at the radio frequency end, one is on the groove line structure near the bonding position of the diode, which can match the diode, and the other is at the end of the fin line transition structure, so that the fin line transition ...

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Abstract

The invention provides a W-band broadband mixer, belonging to the technical field of millimeter wave devices. Based on the basic structure of the existing mixers, the invention adopts some innovative structural features for effectively expanding the frequency conversion band width of a mixer in the existing range of machining accuracy, reducing frequency conversion loss and enlarging the isolation among ports. The innovative structural features comprises: (1) a local oscillation signal energy coupling structure adopts a mutually staggered but non-overlapping asymmetric coupling structure; (2)an intermediate frequency filter adopts a low-pass filter composed of three split ring resonance units different in size and split directions in cascade connection; (3) an intermediate frequency end adopts a minisize rectangular cavity shield; and (4) matching gaps, reflecting metal sheets and the like are additionally arranged at a local oscillation end and a radio-frequency end.

Description

technical field [0001] The invention belongs to the technical field of millimeter wave devices, and relates to a millimeter wave broadband mixer whose radio frequency bandwidth spans the entire W band. Background technique [0002] With the rapid increase of wireless communication users, the microwave spectrum is crowded, coupled with the development requirements of sophisticated weapon systems, the operating frequency of the system is extended to the millimeter wave frequency band. The application of millimeter waves in the field of wireless communication has been extensively studied. In modern millimeter wave communication systems, the performance of the mixer is crucial to the entire receiver. Therefore, the research on the W-band broadband mixer has become an important topic in millimeter wave technology. [0003] The W band belongs to the range of three millimeter waves. The radiation and scattering of electromagnetic waves in this frequency band are obvious during the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03D7/16
Inventor 林先其靳俊叶苏鹏樊勇
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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