Design of an Ultra-Wide Stopband CSRR Microstrip Bandpass Filter for L-Band Applications
8th International Congress on Human-Computer Interaction, Optimization and Robotic Applications, ICHORA 2026, Ankara, Türkiye, 21 - 23 Mayıs 2026, (Tam Metin Bildiri)
- Yayın Türü: Bildiri / Tam Metin Bildiri
- Doi Numarası: 10.1109/ichora69329.2026.11536989
- Basıldığı Şehir: Ankara
- Basıldığı Ülke: Türkiye
- Anahtar Kelimeler: bandpass, bandstop, CSRR, filter, microstrip, ultra-wide
- Ankara Üniversitesi Adresli: Evet
Özet
In this study, a microstrip filter design was implemented. To improve the performance parameters of the design, a Complementary Split Ring Resonator (CSRR) structure is integrated into the ground plane of the design. The aim was to improve bandwidth, selectivity and bandstop suppression results. It was demonstrated that filter exhibits bandpass characteristics with a center frequency of 1.71 GHz, a bandwidth of 24.56 %, an insertion loss of 1.15 dB, and a return loss of 24.7 dB, and shows bandstop characteristics between $2.24-6.4 \text{GHz}$ frequencies according to a -10 dB value. Current density analyses of the design were performed. CSRR structure improved parameter values in the $1.57-1.96 \text{GHz}$ band. By comparing the proposed topology to recent filter studies in the literature in terms of compactness, bandwidth, loss, performance, harmonic suppression, the limited or enhanced features were clearly highlighted. Proposed CSRRloaded structure provides an effective solution for suppressing higher-order harmonics and achieving a ultra-wide stopband performance, all while maintaining high transmission efficiency and low insertion loss in the bandpass.