A Broadband Millimeter-Wave Hollow Waveguide Coupling Structure Configured by a Wire-Eroded Metal Plug-In

作者：Koenen Christian^*; Siart Uwe; Eibert Thomas F; Conway Garrard D; Stroth Ulrich

来源：IEEE Microwave and Wireless Components Letters, 2017, 27(5): 434-436.

DOI：10.1109/LMWC.2017.2690820

• Hollow waveguide components
• millimeter-wave passive component
• modular waveguide structures

The design of aWR10 waveguide coupling structure is presented. Electrically, it consists of an E-plane (series) T-junction and a quarter-wave section. The resulting coupling factor is nearly constant over the entire W-band. A milled split-block network and a wire-eroded metal plug-in, which is inserted into a groove in the split block, implement the coupling structure. This modular design makes the coupling factor easily configurable and enables the realization of quarter-wave section heights in the range of tens of micrometers. The plug-in is fabricated by wire erosion, a machining technique based on electrical discharge (spark machining). This enables precise adjustment of the height and length of the quarter-wave section (+/- 2-mu m contour accuracy) and provides polishedlike surface quality (R-z = 2.1 mu m). Hints for the manufacturing of the metal plug-in are given; full-wave simulations as well as measurements of W-band prototype structures are evaluated, and the possibility of a postfabrication adjustment of the metal plugins is shown.

• 出版日期2017-5