Millimeter wave broadband mixer based on multi-coupling transmission line
A technology for coupling transmission lines and transmission lines, which is applied in the direction of modulation and transformation of balance devices, electrical components, modulation transfer, etc., can solve the problems of frequency conversion loss and noise difference, high bandwidth, complex structure, etc., to save the use of DC blocking capacitors, The effect of expanding operating bandwidth and reducing chip area
Inactive Publication Date: 2018-10-09
HANGZHOU DIANZI UNIV
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Problems solved by technology
Mixers based on active devices can achieve better conversion gain, but will introduce relatively large noise; while mixers based on diodes often use a double-balanced structure when implementing broadband mixers, not only the structure is more complicated (need 2 baluns and 4 diode devices), and it is difficult to achieve very high bandwidth
In addition, when this structure works at a very high frequency such as the millimeter wave frequency band, the frequency conversion loss and noise will also become relatively poor
Method used
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[0016] The present invention will be further described below with reference to the accompanying drawings and examples, and the embodiments of the present invention include but not limited to the following examples.
[0017] Such as figure 1 As shown, a millimeter-wave broadband mixer based on multi-coupling transmission lines, including a multi-coupling transmission line structure, an anti-parallel ground diode pair structure, a low-pass filter, and the like. The mmWave broadband mixer is monolithically integrated using integrated circuit technology.
[0018] The multi-coupling transmission line structure, the anti-parallel diode pair structure and the low-pass filter are connected in sequence; the anti-parallel diode pair structure is formed by two diodes D1 and D2 in anti-parallel connection, one end of which is grounded; the The multi-coupled transmission line structure is composed of five parallel coupled microstrip lines. The radio frequency input signal RF is connected ...
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The invention discloses a millimeter wave broadband mixer based on a multi-coupling transmission line. The mixer comprises a multi-coupling transmission line structure, an anti-parallel grounding diode pair structure, a low-pass filter and the like. The multi-coupling transmission line structure, the anti-parallel grounding diode pair structure and the low-pass filter are successively connected. The multi-coupling transmission line structure is formed by five parallel-coupled microstrip lines. A radio frequency input signal is connected to the left side end of a fourth transmission line. A local oscillation input signal is connected to the right side end of a second transmission line. The two ends of a first transmission line, a third transmission line and a fifth transmission line are connected. The right side end of the third transmission line is connected to the other end of the anti-parallel grounding diode pair structure and then is connected to the low-pass filter to intermediatefrequency output. The mixer has characteristics that the structure of a circuit is simple; a work frequency band is wide; a chip area is small; and single sheet integration is easy to realize in an integrated circuit technology and so on.
Description
technical field [0001] The invention relates to a frequency mixer in microwave and millimeter wave circuits, in particular to a monolithic integrated frequency mixing circuit based on integrated circuit technology, which has a simple design structure and can convert broadband millimeter wave signals to intermediate frequencies. Background technique [0002] With the rapid development of wireless communication and big data services, the low-frequency resources of the wireless spectrum have gradually become saturated. Even if more complex modulation methods are used to improve spectrum utilization, it is difficult to meet the needs of future communication development. Therefore, high-speed, broadband wireless communication systems have higher requirements for large bandwidth and abundant spectrum resources, making it an inevitable trend to extend their operating frequency bands towards microwave and millimeter waves. Due to its frequency bandwidth and short wavelength, millime...
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IPC IPC(8): H03D7/14
CPCH03D7/1408
Inventor文进才孙玲玲
OwnerHANGZHOU DIANZI UNIV