120 research outputs found
Linearization circuits for analog optical datalinks
Issued as final reportInfinera Corporatio
Resonant tunneling and heterostructure bipolar transistor characterization
Issued as Final report, Project no. E-21-Z7
"The Design of a Compact, Wide Spurious-Suppression Bandwidth Bandpass Filter Using Stepped Impedance Resonators"
We propose an analytical design for a microstrip broadband spurious-suppression filter. The proposed design uses every section of the transmission lines as both a coupling and a spurious suppression element, which creates a very compact, planar filter. While a traditional filter length is greater than the multiple of the quarter wavelength at the center passband frequency (lambda(sub g)/4), the proposed filter length is less than (order n(Ssup th) + l)center dot lambda(sub g)/8. The filter s spurious response and physical dimension are controlled by the step impedance ratio (R) between two transmission line sections as a lambda(sub g)/4 resonator. The experimental result shows that, with R of 0.2, the out-of-band attenuation is greater than 40 dB; and the first spurious mode is shifted to more than 5 times the fundamental frequency. Moreover, it is the most compact planar filter design to date. The results also indicate a low in-band insertion loss
A Compact Low-loss Magic-T using Microstrip-Slotline Transitions
The design of a compact low-loss magic-T is proposed. The planar magic-T incorporates the compact microstrip-slotline tee junction and small microstrip-slotline transition area to reduce slotline radiation. The experimental results show that the magic-T produces broadband in-phase and out-of-phase power combiner/divider responses, has an average in-band insertion loss of 0.3 dB and small in-band phase and amplitude imbalance of less than plus or minus 1.6 deg. and plus or minus 0.3 dB, respectively
WN: COGNET: Cognitive radio networks based on OFDM
Issued as final reportNational Science Foundation (U.S.
Miniaturized multi-band-antenna
Issued as final reportCartiza Inc
Temperature dependent small-signal and noise parameter measurements and modeling on InP HEMTs
Issued as final repor
Analysis and performance of BGA interconnects for RF packaging
Issued as final repor
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