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A balun filter and resonator technology, applied in waveguide-type devices, electrical components, circuits, etc., 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: 2019-03-08
CHENGDU PINNACLE MICROWAVE CO LTD
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[0004] The purpose of the present invention is to provide a reconfigurable balun filter based on a half-wavelength 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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[0033] Such as Figure 1 to Figure 2 As shown, this embodiment provides a reconfigurable balun filter based on half-wavelength resonators. The reconfigurable balun filter is composed of three impedance resonators with the same structure, wherein the impedance resonators are printed On a dielectric substrate with a thickness of 25mil and a relative permittivity of 10.2. In this embodiment, the varactor diodes are selected from SMV123 series. It should be noted that the serial numbers such as "first", "second", and "third" 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.
[0034] Specifically, the reconfigurable balun filter includes a first impedance resonator, a second impedance resonator, and a third impedance resonator that are all attached to ...
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Abstract
The invention discloses a half-wavelength resonator-based configurable Balun filter. The half-wavelength resonator-based configurable Balun filter comprises 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-capacitancediode D5, a variable-capacitance diode D6, a variable-capacitance diode D7, a variable-capacitance diode D8, a variable-capacitance diode D9, a variable-capacitance diode D10, a variable-capacitance diode D11, a variable-capacitance diode D12, a variable-capacitance diode D13, a variable-capacitance diode D14, a variable-capacitance diode D15, a variable-capacitance diode D16, a variable-capacitance diode D17, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a chip capacitor C1, a chip capacitor C2 and a chip capacitor C3. By the scheme, a Balun signal output can be formed, and the adjustment of a central frequency and bandwidth also can be achieved.
Description
technical field [0001] The invention relates to the field of wireless communication systems, in particular to a reconfigurable balun filter based on a half-wavelength 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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