Reconfigurable Balun Filter Based on Microstrip Resonator
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A balun filter and resonator technology, applied in the field of balun filter, can solve the problems of low adjustable range, uncontrollable center frequency and relative bandwidth, etc., and achieve the effect of bandwidth adjustment
Active Publication Date: 2019-12-10
杨涛 +1
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[0004] The purpose of the present invention is to provide a reconfigurable balun filter based on a microstrip line resonator, which mainly solves the problems in the prior art such as low adjustable range, uncontrollable center frequency and relative bandwidth, etc.
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[0035] Such as Figure 1 to Figure 2 As shown, this embodiment provides a reconfigurable balun filter based on a microstrip line resonator, and the impedance resonator of the balun filter is connected to a varactor diode by using a microstrip line. Among them, the thickness of the dielectric substrate is 25mil, and the relative permittivity is 10.2. In addition, the varactor diodes are SMV123 series. It should be noted that the serial numbers such as "first" and "second" in this embodiment are only used to distinguish similar components, and should not be understood as specific limitations on the scope of protection. In addition, directional terms such as "bottom", "top", and "edge" described in this embodiment are described based on the drawings.
[0036] Specifically, the reconfigurable balun filter includes a first impedance resonator, a second impedance resonator, and a third impedance resonator that are all attached to a dielectric substrate and have a Γ-shaped structure. ...
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Abstract
The invention discloses a reconfigurable balun filter based on a microstrip line resonator, which mainly solves the problems of low adjustable range, uncontrollable central frequency and relative bandwidth and the like in the prior art. The balun filter includes a first impedance resonator, a second impedance resonator, a third impedance resonator, a variable capacitance diode D1, a variable capacitance diode D2, a variable capacitance diode D3, a variable capacitance diode D4, a variable capacitance diode D5, a variable capacitance diode Capacitance diode D6, varactor diode D7, varactor diode D8, varactor diode D9, varactor diode D10, varactor diode D11, varactor diode D12, varactor diode D13, resistor R1, resistor R2, resistor R3, resistor R4 , resistor R5, resistor R5, resistor R6, resistor R7, resistor R8, resistor R9, resistor R10, resistor R11, capacitor C1, capacitor C2 and capacitor C3. Through the above solution, the present invention can not only form a balun signal output, but also realize the adjustment of the center frequency and bandwidth.
Description
technical field [0001] The invention relates to the field of wireless communication systems, in particular to a reconfigurable balun filter based on a microstrip line resonator. Background technique [0002] The balun filter is an independent microwave passive device, which functionally realizes the effective combination of the filter and the balun in the radio frequency circuit, that is to say, it has both the frequency selection characteristics of the filter and the balun Lun's unbalanced input signal into a balanced signal function. At the same time, the balun filter has the advantages of low cost, high integration, and miniaturization, and is widely used in balanced mixers, balanced push-pull amplifiers, and antenna feed networks. Nowadays, with the rapid development of modern wireless communication systems, spectrum resources are becoming increasingly tight, and more and more environments require electronic devices used in them to be tunable and multi-functional, so as...
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