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In this paper, a new miniaturized GPS antenna is presented. The antenna design is based on a dipole topology and is intended to operate at the L1 frequency of 1.575 GHz. A conventional λ/2 dipole would be too large at this frequency so miniaturization techniques have been applied. The result is a planar antenna whose dimensions are 32 mm × 24 mm, making it one of the smallest GPS antennas ever reported...
Advanced microwave wireless devices are needed to dynamically adapt to field conditions. One possible approach for circuit tunability is optical control. In this paper a new optically tunable filter concept is proposed based on LTCC technology and new photoconductive polymer materials. The theoretical foundations of a tunable resonator, simulations of resulting filter performance, specifications of...
This paper presents an oscillator employing miniature, high-Q, low temperature cofired ceramic (LTCC) resonator in conjunction with a novel implementation technique for achieving low phase noise. The reduced-size LTCC resonator is realized with a dielectric material having epsivr = 68, the first ever reported. As well, the oscillator circuitry design exploits the seldom used device-line technique...
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