Abstract
A new planar microstrip balun with two operation bands is presented and investigated in this letter. Originated from the traditional Marchand balun, the proposed dual-band balun is designed on a symmetrical four-port network with one short-circuited port. Derived equations and design charts show that the frequency ratio (m = f2/f1) of these two bands could be flexibly controlled in a wide range of 2.0-4.6. Moreover, inherent transmission zeros nearby each band have been introduced into this dual-band balun, aiming to improve the frequency selectivity. For verification, a prototype dual-band balun operating at 2.4 and 5.2 GHz (m = 2.17) is implemented and measured. Both simulation and measured results are recorded with good agreement.
Original language | English |
---|---|
Article number | 8051075 |
Pages (from-to) | 962-964 |
Number of pages | 3 |
Journal | IEEE Microwave and Wireless Components Letters |
Volume | 27 |
Issue number | 11 |
DOIs | |
Publication status | Published - 1 Nov 2017 |
MoE publication type | A1 Journal article-refereed |
Keywords
- Dual-band response
- flexible frequency ratio
- high selectivity
- Marchand balun