Recent development of microstrip band-pass filters for microwave and millimeter-wave integrated circuits
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Microstrip band-pass filters recently developed for microwave and millimeter-wave integrated circuits are presented. The new half-wavelength coupled-line band-pass filters, employing symmetric and asymmetric broadside-coupled microstrip structures, exhibit about 1-dB insertion loss at 10 GHz. The novel spurline band-pass filters, using two and three parallel-coupled lines, have insertion losses of less than 1 and 1.3 dB, respectively, at 5 GHz. Experimental and theoretical results also agree well.