Frequency-hopping filter with improved structure
A filter and radio frequency filtering technology, which is applied in the field of electronic communication, can solve the problems of poor heat dissipation of components, limited function of π-type filter circuit, large insertion loss, etc., and achieve the effect of stable operation
Active Publication Date: 2015-03-25
GUANGDONG KUANPU TECH CO LTD
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Problems solved by technology
[0002] The shortcomings of the early high-power frequency-hopping filter design are that the insertion loss is large, the filtering effect is not good, and the heat dissipation of the components is poor, which leads to a short working life. Designed to dissipate heat; the existing high-power frequency-hopping filter products are bulky and costly to manufacture
However, we found that because the switching frequency of the high-voltage drive circuit is only one-fifth of the resonant frequency of the resonator, which is a very low frequency, the effect of the π-type filter circuit is very limited, otherwise the switching speed will be affected
Method used
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[0032] The structure applying the frequency hopping filter of the present invention will be further described below in conjunction with the accompanying drawings.
[0033] As shown in the figure, a frequency hopping filter 100 with an improved structure has a radio frequency operating frequency above 30 MHz, including a metal shell 1, a resonant coil 51 arranged in the metal shell 1, and a switching diode array circuit A diode circuit board 55 with a resonant capacitor, a choke coil 43, a radio frequency filter circuit board 41 provided with a filter capacitor, a high voltage drive circuit 31 and a digital control circuit 32, wherein the resonant coil 51 and the resonant capacitor mainly form a resonator, The filter capacitor and the choke coil 43 mainly constitute a radio frequency filter circuit. The sequential signal control flow chart between the resonator, switching diode array circuit, radio frequency filter circuit, high voltage drive circuit 31 and digital control circ...
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The invention provides a frequency-hopping filter with an improved structure. The frequency-hopping filter comprises a metal shell, a resonator, a switch diode array circuit, a high-voltage drive circuit and a digital control circuit. The resonator and the switch diode array circuit form a first working unit and are arranged in a first containing cavity in the metal shell at the same time. The high-voltage drive circuit and the digital control circuit form a second working unit and are arranged in a second containing cavity in the metal shell at the same time. The frequency-hopping filter further comprises a radio frequency filter circuit with choking coils. The high-voltage drive circuit is connected with the switch diode array circuit through electrical signals of the radio frequency filter circuit. The radio frequency filter circuit forms a third working unit and is arranged in a third containing cavity in the metal shell. The first containing cavity, the second containing cavity and the third containing cavity are isolated from one other. In this way, radio frequency signals can be shielded separately, influences, caused by noise signals and heat in the first containing cavity, on the radio frequency filter circuit and the choking coils are avoided, and the working stability of the three working units is greatly improved.
Description
technical field [0001] The present invention relates to the field of electronic communication, in particular to a frequency hopping filter, which is generally installed at the output port of a power amplifier of a transmitter to effectively filter out useless transmission clutter frequencies and prevent other transmission The wireless interference signal of the machine enters the local transmitter, and the frequency hopping filter belongs to the band-pass filter. Background technique [0002] The shortcomings of the early high-power frequency-hopping filter design are that the insertion loss is large, the filtering effect is not good, and the heat dissipation of the components is poor, which leads to a short working life. Designed to dissipate heat; existing high-power frequency-hopping filter products are bulky and costly to manufacture. For this reason, the application number is 200910040262.X, and the name is a patented invention of a frequency hopping filter, which disc...
Claims
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IPC IPC(8): H03H5/00H03H1/00
Inventor文俊
OwnerGUANGDONG KUANPU TECH CO LTD