A Symmetrical Design of a Microstrip Tunable Bandpass Filter | SpringerLink
Design and implementation of magnetically–tunable quad–band filter utilizing split–ring resonators at microwave frequencies | Scientific Reports
Microfluidically Controlled Frequency Tunable Monopole Antenna For High Power Applications | PDF | Microwave | Antenna (Radio)
Tunable Frequency Filter Based on Twisted Bilayer Photonic Crystal Slabs | ACS Photonics
Tunable Band-Pass Microstrip Filter Design Based on Split-Ring Element | Wireless Personal Communications
A modified Jerusalem microstrip filter and its complementary for low phase noise X-band oscillator | International Journal of Microwave and Wireless Technologies | Cambridge Core