Coplanar waveguide double-frequency power divider based on crossed composite left and right hand transmission lines
A composite left-handed, coplanar waveguide technology, applied in waveguide-type devices, electrical components, connecting devices, etc., can solve problems such as excessive size, and achieve the effects of reduced size, good isolation, and compact structure
Active Publication Date: 2020-04-10
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology
At the same time, by adopting structures such as interdigitated capacitors, snake-shaped inductors, and spiral-shaped defect grounds, the transmission line per unit length has larger distributed series capacitance and parallel inductance than ordinary coplanar waveguide transmission lines, achieving a more compact power supply. divider structure, so as to solve the problem of oversize in the prior art, and realize dual-frequency equal power distribution at the same time
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Embodiment 1
[0073] Assume that the operating frequency f of the coplanar waveguide dual-frequency equal power divider based on the cross-type composite left-handed transmission line provided by this embodiment is 1 = 0.9GHz, f 2 = 3.5GHz. The coplanar waveguide circuit of the power divider is etched on the polytetrafluoroethylene dielectric substrate, and the relative dielectric constant of the dielectric substrate is ε r =2.65, the thickness is 1mm; the isolation resistance used is 0805 type chip resistor with 100Ω, the package size of the resistor is 2.0mm×1.2mm; the circuit size is 19.8mm×33.8mm or 5.9%λ g ×10.1%λ g ,λ g is the guided wavelength on the dielectric substrate corresponding to the working frequency of 0.9GHz.
[0074] The specific dimensions of the power splitter are as Figure 7 , Figure 8 As shown, the specific values of the dimensions marked in the figure are shown in Table 1:
[0075] Dimensions of the power divider in Table 1 Example 1 (unit: mm)
[0076] ...
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The invention relates to a coplanar waveguide double-frequency power divider based on crossed composite left and right hand transmission lines, and belongs to the field of radio frequency microwave circuits. The power divider comprises a metal conduction band on the front surface of a dielectric substrate, and comprises a signal input port transmission line, a first signal output port transmissionline, a second signal output port transmission line, two sections of crossed composite left and right hand transmission lines, a metal through hole I and an isolation resistor; and the metal conduction band is arranged on the back surface of the medium and comprises a metal patch. Two quarter-wavelength transmission lines in a traditional Wilkinson power divider are replaced by quarter-wavelengthcrossed composite left-right hand transmission lines with +90-degree and-90-degree phase shift characteristics respectively, so that the power divider has a dual-frequency working bandwidth; and, inaddition, structures such as an interdigital capacitor, a serpentine inductor and a spiral defected ground are adopted, so that compared with a common coplanar waveguide transmission line, each unit length of transmission line has larger distributed series capacitance and parallel inductance, and a more compact power divider structure is realized.
Description
technical field [0001] The invention belongs to the field of radio frequency microwave circuits, and relates to a double-frequency Wilkinson equal power divider in the form of a coplanar waveguide circuit. Background technique [0002] A power splitter is a common power distribution device and an important part of a wireless communication system. With the rapid development of mobile communication technology, the use of microwave frequency bands is becoming more and more crowded, and the integration of radio frequency circuits is required to be higher and higher. Radio frequency devices that can transmit signals in two or more frequency bands at the same time are an important part of today's mobile communication systems. Therefore, it is of great significance to study the dual-frequency power splitter. [0003] In the existing technology, the Wilkinson power divider is usually implemented in the form of a microstrip line circuit. Compared with the microstrip line, the centra...
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IPC IPC(8): H01P5/16
CPCH01P5/16
Inventor 黄文李平阮巍罗伟
Owner CHONGQING UNIV OF POSTS & TELECOMM