Design of microstrip lowpass filter with wide stopband and sharp roll-off using hexangular shaped resonator

作者：Hayati M^*; Gholami M; Vaziri H S; Zaree T

来源：Electronics Letters, 2015, 51(1): 69-U89.

DOI：10.1049/el.2014.3853

• microwave measurement
• preamplifiers
• measurement uncertainty
• measurement uncertainties
• preamplifier gain variation
• temperature change
• mismatch uncertainty
• voltage standing wave ratio

A compact lowpass filter using a hexangular shaped resonator is presented. The designed lowpass filter has a -3 dB cutoff frequency of 2.97 GHz. The stopband bandwidth for the attenuation level of -20 dB is from 3.32 GHz up to 21 GHz, and the circuit only occupies 10.04 x 10.92 mm(2). The structure is simulated, fabricated and measured. Both simulation and measured results are presented and compared and there is good agreement between them. The insertion loss in the passband is < 0.06 dB and the fabricated filter presents a sharp transition band from 2.97 to 3.32 GHz for the attenuation level of -3 and -20 dB, respectively.

• 出版日期2015-1-8