Dr. N. Hariharan, Dr. Ragesh G K, Er. Ajay Kumar. A Compact Microstrip Quadband Bandpass Filter using Six Mode Resonator and a Hairpin Resonator. IJAST [Internet]. 2020Jun.1 [cited 2024May3];29(10s):. 8153-8158. Available from: http://sersc.org/journals/index.php/IJAST/article/view/24266