Professors/Researchers on research gate, please help me about simulation results of reconfigurable antenna with or without DC biasing circuit. Is there any difference between, results we get with DC blocking capacitor/RF chokes and results we get without DC blocking capacitor/RF chokes/DC bias line. please reply.
Dear Ghanshyam
As per my knowledge, if you have to simulate antenna with and without DC biasing circuit then results may be vary (minor variation may be possible) due to passive elements such as Capacitor, Inductor and Resistor . So, designing the reconfigurable antenna, biasing circuit is play a vital role so carefully design the DC biasing circuit then it does not affect the probable results in simulation.
Hope you find the answer.
Dear Ghanshyam
Please consider the following diode characteristics in forward biased and reversed biased conditions when doing simulations in CST microwave studio.
For example: a PIN diode model no. ALPHA 6335 beam lead 0.7 V dc voltage is applied . At the ON state condition (forward biased), the PIN diode is equivalent to series of resistor (value R= 2.6 ohm) and inductance (take L= 20 to 30 nH value) . In the OFF state condition, it can be represented RC parallel circuit along with Series inductane. The value of capacitor can be considered 0.081 pF and resistance value is too high around 20 K ohm (in reverse biased condition). For DC biasing circuit, the simplified way you can consider is diode + metal strip + DC block capacitor in series but keep in mind that PIN diode is NOT directly contacted to RF input.
Hope you find the answer.
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