High linearity frequency mixing component
A high linearity and frequency mixing technology, applied in the field of radio frequency communication, can solve problems such as insufficient linearity and mixer interference, and achieve the effects of optimizing linearity, reducing volume, and improving second-order and third-order linearity
Inactive Publication Date: 2018-11-23
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology
[0007] The purpose of the present invention is to provide a high-linearity mixing component, which solves the problem that existing mixers are easily interfered by second-order and third-order nonlinear signals, resulting in insufficient linearity
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Embodiment 1
[0041] A high linearity mixing component provided by a preferred embodiment of the present invention, such as figure 1 shown, including an RF absorption filter, an RF broadband balun connected to the output of the RF absorption filter, two mixers connected to the output of the RF broadband balun, a The IF broadband balun, the IF absorption filter connected to the output of the IF broadband balun, and the LO broadband balun connected to the input of the mixer, the circuit schematic diagram is as follows figure 2 shown.
[0042] Further, the RF absorption filter adopts an LC filter, and its circuit schematic diagram is as follows image 3 As shown, it includes three capacitors C8, C9, C11 and two inductors L1 and L4, one end of the inductor L1 is connected to C8, the other end is connected to C9, and the other end of C8 and C9 is connected to parallel C11 and L4, C11 and The other end of L4 is grounded, and the frequency range of the passband of the RF absorption filter can b...
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The invention discloses a high linearity frequency mixing component, which belongs to the radio frequency communication technology field. The high linearity frequency mixing component comprises an RFabsorption type filter, an RF wideband Balun connected with the RF absorption type filter, two frequency mixers connected with the RF wideband Balun, an IF wideband Balun connected with the two frequency mixers, an IF absorption type filter connected with the IF wideband Balun, and an LO wideband Balun connected with the frequency mixers. The RF absorption type filter in a radio frequency band isused to absorb a plurality of harmonic signals, and then the IF absorption type filter in a middle frequency band is used to absorb the rest of harmonic signals, and therefore the influences of the harmonic signals on the linearity of the whole component can be prevented; and at the same time, double double balanced frequency mixers are used for frequency conversion to offset cross modulation signals, and under a precondition of not increasing the power consumption of the whole frequency mixing component, the linearity thereof is greatly optimized, and the second-order linearity and the third-order linearity of the frequency mixing component are effectively improved, and therefore a problem of insufficient linearity caused by the conventional frequency mixers being easily interfered by second-order and third-order non-linear signals is solved.
Description
technical field [0001] The invention belongs to the technical field of radio frequency communication, and relates to a high-linear frequency mixing component. Background technique [0002] With the development of communication technology, more and more communication requirements make the spectrum utilization rate higher and higher, spectrum resources become more and more tense, and the space electromagnetic environment becomes increasingly complex. Especially in the field of radio frequency communication, communication channels in various frequency bands are filled with a large number of useless or interfering signals, and inter-channel interference is also more serious. In order to avoid responding to false signals, higher requirements are placed on the linearity of the receiver. [0003] The RF link limits the overall linearity of the system since the IF link is usually built using feedback or op-amp based structures, and the IF filter can filter out-of-band signals. Acco...
Claims
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Patent Timeline
Login to View More IPC IPC(8): H04B1/10H04B1/16
CPCH04B1/10H04B1/1027H04B1/16
Inventor 石玉燕阳尉旭波钟慧陈良
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA