The mismatch was finally traced to the resistance offered by the varactor diode
Rydberg, "Electrically steerable single-layer microstrip traveling wave antenna with varactor diode
based phase shifters," IEEE Transactions on Antennas and Propagation, Vol.
In this paper, the loaded HDGS/EDMS varactor diode
is introduced to realize the tunable dual-stop-band filter.
The HMC588LC4B Wideband HBT MMIC VCO incorporates the resonator, negative resistance device and varactor diode
The variable phase shifter uses a varactor diode
1T362 from Sony and a variable attenuator, a PIN diode HSMP-4810 from HP.
In , a varactor diode
is used in a PIFA antenna for tuning the operating frequency.
The Sony 1T362 varactor diode
is used for the variable phase shifter and the HP PIN diode HSMP-4810 is used for the variable attenuator.
The capacitance of the varactor diode
can be tuned from 2.
By using semiconductor varactor diode
, an electrical reconfigurable microstrip LC bandpass filter is designed, fabricated and measured.
The used varactor diode
is Skyworks SMV1405, which offers a tunable range of capacitance from 0.
The Q suffers from the high series resistance of the varactor diode
junction, which results in a decrease in Q when the diode capacitance is increased.