Five-Port E-Plane Y-Structure Bifurcated Waveguide Power Divider at Ka-Band

• Main Authors: Wei-Shiun Lan, 藍煒勛
• Other Authors: Eric S. Li
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/2ja8cg

碩士 === 國立臺北科技大學 === 電腦與通訊研究所 === 101 === For solid-state amplifier in millimeter-wave, the most useful method to enhance output power is to design a low loss power combiner/divider. In this thesis, we present a Five-Port E-Plane Y-Structure Bifurcated Waveguide Power Divider in Ka-band. The specifications of the proposed power divider operate at the range from 32 GHz to 36 GHz, the return loss at each port and the isolation between from output ports are required to be greater than 20 dB, the insertion loss need to be less than 0.2 dB. Before design power divider in this thesis, we make a discussion on micro-wave and millimeter-wave power combing/dividing technology, to understand how to combine power divider, then to study the evolution and design of E-Plane Bifurcated Waveguide Power Divider which related to our structure, so we can refer and improve it in our design. Finally, we present our design. In the procession of designing, it considers the effects of fabrication and assembly in our structure, and then follows the steps to design Chebyshev matching transformer, radial waveguide, and suitable value of resistive film. After that, they combine to a Three-Port E-Plane Y-Structure Bifurcated Waveguide Power Divider, and then it extends to Five-Port Power Divider of this thesis. A finite element method based commercial CAD package, HFSS, is chosen to conduct the required simulations, and the results are verified experimentally, it is shown that the proposed design can match the measurement successfully. In this thesis, the design differs from other similar structures; we use the 10 mil substrate and reduce the numbers of impedance transformer, it is shown that the proposed design have advantages on assembly, fabrications, and low cost, so it is very suitable for fabrication. The design in this thesis can be extend to multi-port power divider, and it will be used in solid-state amplifier in the future.