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Two kind of GPS (Global Position System) omnidirectional antenna array which is conical conformal with revolving projectile is researched. One is quadrifilar helix antenna on rotary table and the other microtrip antenna conformal to the same rotary table. The basic theory and design method of antenna arrays are described. The radiation characteristic of the antenna arrays is presented and they are...
This paper presents a new dielectric resonator antenna (DRA) for wideband applications, which has a stepped construction-the hexagon shaped upper resonator and triangle shaped lower resonator. The DRA is excited by a conformal inverted-trapezoidal patch connected to a microstrip line. The wider bandwidth is achieved, because of three factors: compact honeycomb and triangle shaped dielectric resonator,...
A novel multilayer coupled stripline resonator structure is introduced to realize miniature broadband band-pass filter using low temperature co-fired ceramic (LTCC) process with defected ground structure (DGS). Wide bandwidth and good selectivity are obtained by exploiting four resonators and the filter exhibits a high rejection in stopband by adopting the tapered DGS. Moreover, an inductance feed...
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