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Microwave and Optical Technology Letters - MICROWAVE OPT TECHNOL LETT. 01/2001; 31(6):426-428.
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ABSTRACT: In this paper, a K-band push-push oscillator is designed and
implemented with the form of series feedback, which has good coupling
efficiency and oscillation frequency stability. The oscillator shows the
output power of 1.17 dBm, the fundamental frequency suppression of 24.17
dBc at 18.37 GHz, and the phase noise of -100 dBc/Hz at offset frequency
of 100 kHz
Microwave Conference, 1999 Asia Pacific; 12/1999
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ABSTRACT: In this paper, an improved hybrid-type resistive mixer for 5.8 GHz
band wireless LAN was designed and fabricated in order to obtain low 3rd
order inter-modulation distortion (IMD3) and high output power by the
low LO power level. The IMD3 of the resistive mixer is 44.33 dBc with -5
dBm RF power at 5.8 GHz. In addition, the conversion loss and 3rd-order
intercept point (IP3) are 7.83 dB and 12 dBm with 4 dBm LO power level,
respectively. The isolations of LO/RF and LO/IF are 50 dB and 60 dB,
respectively
Microwave Conference, 1999 Asia Pacific; 12/1999
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ABSTRACT: K-band hair-pin resonator oscillators using a frequency doubler
and the push-push method are presented in this paper. An HP EEsof Libra
ver. 6.1 has been used for the nonlinear design of the oscillators. For
the oscillators using the frequency doubler and the push-push method,
the output power of 0.83 dBm and -1.67 dBm, and phase noise of -86
dBc/Hz and -90 dBc/Hz at the offset frequency of 100 kHz are obtained,
respectively
Microwave Symposium Digest, 1999 IEEE MTT-S International; 02/1999
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ABSTRACT: The dielectric resonators (DRs) with dielectric properties are widely used in microwave integrated circuit (MICs) and monolithic microwave integrated circuits (MMICs). The variational method as numerical simulation scheme would be applied to calculate the resonant frequencies(f<sub>r</sub>) and Q-factors of microwave dielectric resonators. The dielectric resonator with a cylindrical “puck” structure of high dielectric material is modeled in this simulation. The parameters, such as the diameter, the height, and the dielectric constant of dielectric resonator, would determine the resonant frequency and the and Q-factor. The relationship between these parameters would effect each other to evaluate the approximate resonant frequency. This simulation method by the variational formula is very effective to calculate f<sub>r</sub> and Q-factor in high frequency microwave dielectric resonator. The error rate of the simulation results and the measured results would be considered to design the microwave dielectric resonators
Properties and Applications of Dielectric Materials, 1997., Proceedings of the 5th International Conference on;
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ABSTRACT: The optical field distribution of buried polymeric waveguides,
fabricated by using injection molded substrates, are calculated by
numerical techniques. The refractive index profiles measured by the
refracted near field (RNF) technique are directly used to calculate the
field distribution of polymeric waveguides. A comparative study of the
refractive index profiles based on modeled and numerical values are
discussed
Properties and Applications of Dielectric Materials, 1997., Proceedings of the 5th International Conference on;
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ABSTRACT: Excellent efficiency of a linearly polarized microstrip array in Ku-band is achieved by having proper impedance matching throughout the array and by properly using the corporate and series fed by microstrip transmission lines. The cavity-backed microstrip patch is used to obtain relatively wide bandwidth. The auto-tracking Ku-band antenna in the azimuth direction has developed with a very low profile for vehicle's rooftop mounting, as well as, a low manufacturing cost. The main beam of array is tilted 15° away from the broadside direction to provide optimum coverage for Korea satellite III.
Conference Proceedings.
