{'fraction_non_alphanumeric': 0.022941970310391364, 'fraction_numerical': 0.012145748987854251, 'mean_word_length': 5.081967213114754, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Dual-band second order microstrip filter using dual-mode perturbed meander loop resonators

A dual-band dual-mode filter with second order response in each band is presented for application in near-adjacent channel communications systems. Utilizing large perturbations in a meander resonant structure the resonant frequencies of orthogonal field modes are split allowing for a linear coupling arrangement. The filter's passbands are centered at 2.35 GHz and 2.57 GHz with fractional bandwidths of 3.5% and 3%. A method for developing the filter from an unperturbed second order filter and EM optimization is presented. The measured filter shows good performance in both in-band matching and stopband rejection between the bands of operation.