Design method of ultra-wideband radio frequency power dividing feed network

Abstract

The invention discloses a design method of an ultra-wideband radio frequency power dividing feed network. The embedded design of the ultra-wideband radio frequency power dividing feed network is realized by combining a planar resistor embedding process with a microwave multilayer printed board manufacturing process. The characteristic impedance value of the strip line in the network is reduced through impedance conversion and power divider unit parameter optimization, the line width of the strip line in the feed network is widened under the condition that the thickness parameter of a printed board is not changed, and the circuit processing difficulty is effectively reduced. Through hole grid design is adopted around the power dividing feed network for electromagnetic shielding, signal crosstalk between circuits is reduced, and the electromagnetic compatibility of the circuits is effectively improved. On the basis of improving the integration level of the microwave circuit, the problem of interstage standing wave accumulation deterioration caused by cascade connection of the multi-stage power dividers is reduced; the increase of the line width of the internal network strip line reduces the influence of the processing error of the printed circuit on the radio frequency index of the circuit, and reduces the conductor loss of the feed network at the same time.

Description

technical field

[0001] The invention belongs to the field of microwave circuit integration, and in particular relates to a design method of an ultra-wideband radio frequency power division feed network. Background technique

[0002] The phased array RF feed network is the key circuit to realize the receive analog beamforming and transmit power distribution of the phased array system. The amplitude-phase consistency of the RF feed network and the standing wave at the port are the indicators that need to be paid attention to in the design of the feed network. With the increasing miniaturization requirements of phased array system integration, the previous independent modular RF power distribution and feeding network design methods are increasingly unable to meet the requirements of RF system integration, especially the phased array tile integration method requires power distribution and feeding The network and RF transceiver components are integrated; in addition, with the inc...

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