References
- Zhao Z, Chen J, Yang L, et al. Three-pole tunable filters with constant bandwidth using mixed combline and split-ring resonators. IEEE Microwave Wirel. Compon. Lett. 2014;24:671–673.10.1109/LMWC.2014.2340996
- Chi PL, Yang T, Tsai TY. A fully tunable two-pole bandpass filter. IEEE Microwave Wirel. Compon. Lett. 2015;25:292–294.10.1109/LMWC.2015.2409794
- Ge C, Zhu XW. Highly-selective tunable bandpass filter with two-path mixed coupling. IEEE Microwave Wirel. Compon. Lett. 2014;24:451–453.10.1109/LMWC.2014.2316218
- Anand A, Small J, Peroulis D, et al. Theory and design of octave tunable filters with lumped tuning elements. IEEE Trans. Microw. Theory Tech. 2013;61:4353–4364.10.1109/TMTT.2013.2287674
- Beukman TS, Geschke RH. A tune-all wideband filter based on perturbed ring-resonators. IEEE Microwave Wirel. Compon. Lett. 2013;23:131–133.10.1109/LMWC.2013.2245643
- Skyworks SMV123x series: Hyperabrupt junction tuning varactors data sheet. Sunnyvale (CA): Skyworks Solutions; 2012.
- Bahl I. Lumped elements for RF and microwave circuits. Boston (MA): Artech House; 2003.