{'fraction_non_alphanumeric': 0.02714164546225615, 'fraction_numerical': 0.0, 'mean_word_length': 5.592178770949721, '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}}
Substrate integrated waveguide‐based complementary split‐ring resonator and its arrays for compact dual‐wideband bandpass filter design

In this article, a compact bandpass filter (BPF) with dual‐wideband is developed using single loop complementary split‐ring resonators (CSRRs) loaded substrate integrated waveguide (SIW). The dual‐wideband response is achieved by etching the CSRRs with a bandstop characteristics on a high‐pass SIW filter structure. The characteristics of CSRR and double CSRRs arrays are studied. With the specification of BPF, the parameters of CSRRs sizes, opening directions and spacing between CSRRs can be obtained, then a dual‐band BPF is realized using four CSRRs array with different opening directions etched on the top metal layer. Since the CSRRs have the sub‐wavelength characteristics, the electrical size of the filter is compact and the size of the filter does not increase. Moreover, the bandwidth of filter can be controlled by adjusting the dimensions of CSRRs and the distances between CSRRs array. As validation, a filter prototype is designed, fabricated, and measured, and the experimental results verify the feasibility of the design.