Micromachined millimeter-wave rectangular-coaxial branch-line coupler with enhanced bandwidth
Research output: Contribution to journal › Article
Colleges, School and Institutes
Wideband millimeter-wave branch-line couplers have been demonstrated using micromachined air-filled rectangular-coaxial lines supported by quarter-wavelength stubs. The coaxial lines are constructed by bonding five layers of gold-plated silicon or SU8 slices. The measured coupler shows an insertion loss of 3.2-4.0 dB in the coupled and thru ports between the frequencies 31.3-47.6 GHz. The isolation is better than 12.8 dB, and the return loss less than -10 dB. In addition to providing support, the stubs enhance bandwidth when properly placed.
|Number of pages||6|
|Journal||IEEE Transactions on Microwave Theory and Techniques|
|Publication status||Published - 1 Jul 2009|