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This paper presents detailed investigations on resonant-mode behavior of a new three-mode resonator, which consists of a parallel-coupled microstrip line resonator embedded with a slotline resonator. Electric-field distributions and modal resonant frequencies of three modes are analyzed by using an electromagnetic simulator, thereby showing that the three modes are controllable with the ratio of the...
A novel filter prototype composed of multistage of stepped impedance resonators (SIRs) is proposed to realize the ultra-wideband bandpass (UWB) filter. The relation between the modes number and stage number of resonators is firstly discussed, followed by the derivation of the corresponding Chebyshev filtering function. Furthermore, the equivalent circuit model of this new filter prototype is established...
A novel compact CPW-type magnetic loop probe (2.3times2.3 mm) is proposed. Unlike the conventional one[1], the new probe move the impedance-transition to the CPW line part, so that the new probe possesses the property of symmetry (to suppress the influence of induced magnetic field created by the probe) as well as inherits/enhances the ability to suppress the loop self resonance(up to 10 GHz). Based...
A field mapping system used in microwave frequency band is established for the purpose of surface field detection. A section of coaxial line with a protruded inner conductor is used as an electric probe, while a new compact CPW-type loop probe is designed as a magnetic probe. The electric probe used here has a very high sensitivity and could be used up to 18 GHz. The new designed magnetic probe has...
In this paper, a novel dual-band bandstop filter (DBBSF) is proposed by using composite shunt resonators, and an approximate design method is developed based on the lumped-element circuit of the filter. Both the midband frequencies and the stopband widths of the dual bands of the filter can be controlled separately. A dual-band BSF with center frequencies of 1.7 and 2.3 GHz is designed and fabricated...
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