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LTCC substrate has been widely used in many fields nowadays. In this paper, we investigate the use of it as a dielectric resonator antenna. Marcatili's approximation is used to predict the modes of a dielectric resonator (DR). HFSS eigenmode model has been built to verify this method. Subsequently, a dipole is applied to excite the DR and its radiation properties have been studied. Finally, an example...
This paper discussed a millimeter-wave dipole antenna on a LTCC board. The dipole is fed with a microstrip line back by a ground patch serving as a reflector. 10dB end-fire antenna gain is obtained. The LTCC board acts as a dielectric cavity enhancing end-fire gain. It is found that antenna placement affected significantly the end-fire gain, which can be explained by radiation discontinuity on the...
This paper presents a folding scheme to address fundamental issues of planar electrically small resonant antennas with small radiation resistance, high Q factor, and narrow bandwidth. Two printed folded helical antennas are investigated as examples of small antennas for GSM1800/1900 bands. Dramatic bandwidth enhancements of as much as 66% and 163% are found, respectively, for folded helical dipole...
A novel coupled line structure is studied based on two layers of crossing strips with dense interconnecting vias. The two arrays of vias resembling fence walls in substrate integrated waveguides help enhance the inductive coupling significantly. Dispersion characteristics of both odd and even modes are investigated with emphasis on phase equalization and impedance design as well as coupling enhancement...
A novel ultra slow-wave transmission line structure using three-dimensional periodic substrate metallization is proposed, where each unit cell is made up of a multilayer loop as a series inductor and composite inter-digital strips as the shunt capacitor. Design trade-off between high slow-wave factor (SWF) and small group delay (dispersion) is addressed. A transmission line on a 4-layer FR4 substrate...
This paper presents the analysis of a microstrip line surrounded by metalized substrates. The metalized substrates are dielectric substrates with vias through and either with or without patch covers. The guided-wave characteristics are investigated by full-wave electromagnetic simulations with experimental verification. It is found that the metalized substrate would increase the phase constant (slow-wave...
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