Balun combiner integrated feed network

Abstract

The invention discloses a balun combiner integrated feed network in the field of wireless communication and radio astronomy. The balun combiner integrated feed network comprises a first impedance matching printed board and is characterized in that the front face of the impedance matching printed board is provided with two gradual-change type metal microstrip lines, narrow ends of the two metal microstrip lines are each provided with an antenna connector, wide ends of the two metal microstrip lines are connected with coaxial port inner conductors respectively, the back face of the impedance matching printed board is provided with two gradual-change type metal microstrip ground wires, narrow ends of the two metal microstrip ground wires are each provided with an antenna connector, and wide ends of the two metal microstrip ground wires connected with coaxial port outer conductors respectively. The balun combiner integrated feed network has the advantages that impedance conversion is achieved, balance-unbalance port conversion is achieved, port forming is achieved, loss is low, feed efficiency is high, the structure is compact, machining cost is low, and the balun combiner integrated feed network is very suitable for an antenna working under the situation of wide-band double-wire polarization or double-circle polarization application.

Description

Technical field [0001] The invention relates to a feeding network of a broadband reflector antenna in the technical fields of communication, broadband direction finding, telemetry, remote sensing, radio astronomy and the like, and is specifically a balun combiner integrated feeding network. Background technique [0002] At present, the feed network used in broadband reflector antennas has the following forms. Although each has its own characteristics in performance, they all have certain shortcomings. [0003] 1. The Chinese patent number is CN103151602, and the name is "Broadband Multi-Dipole Antenna with Frequency-Independent Radiation Characteristics". The patent discloses a feed network with 8 baluns and 8 low-noise amplifiers. Network, this kind of feed network structure is complicated, the cost of using 8 low-noise amplifiers is high, the phase consistency cannot be guaranteed, and the wideband 180° phase shifter has high loss. (As shown in Figure 8 of the accompanying drawi...

AI Technical Summary

Problems solved by technology

[0004] 2. The Chinese patent number is CN103151602, and the title is "Broadband Multi-Dipole Antenna with Frequency-Independent Radiation Characteristics". The patent also discloses a feed network, a feed network in the form of an active balun. The electrical network requires a specially designed precision process for manufacturing, and the cost is very high, and it contains 4 low-noise amplifiers, and the phase consistency of the low-noise amplifier cannot be guaranteed

[0005] 3. The Chinese patent number is CN103151602, titled "Broadband Multi-Dipole Antenna with Frequency-Independent Radiation Characteristics", which discloses a feed network, a feed network in the form of 4 passive baluns, this The feed network can only be 3GHz to 13.5GHz. If the frequency multiplier is higher, the insertion loss and impedance mismatch will deteriorate sharply, resulting in poor performance of the entire feed network.

[0006] 4. Feed network in the form of double-layer parallel passive balun. This kind of feed network places two layers of balun in a small space (1 ~ 2mm), and it is difficult to realize the process.

In addition, when the frequency is above 9GHz, it will have a great impact on the standing wave, and the overall performance of the feed network will deteriorate

Images