Could some electronics guru here please clarify this a bit. As a microstrip is a transmission line, can a half wavelength dipole antenna be modeled as two transmission lines, each of physical length wavelength/4, coupled capacitively? The free ends of each microstrip drive free space impedances(377 Ohm) each, whereas the other end of one is connected to the signal source, and the other microstrip has one end grounded. Any flaws in this reasoning ?
Am 30.09.2020 um 13:57 schrieb amal banerjee:
You need a balun for driving the symmetrical antenna and Lambda/2 is too long. Also You need the effective epsilon_r to shorten 2nd time of You constellation.
Use Balanis/Dipol for a first lenght, and then calculate the effective epsiolon_r for 2nd shortening.
:)
Am 30.09.2020 um 16:18 schrieb Leo Baumann:
with PCB Toolkit from internet.
:)
Am 30.09.2020 um 16:19 schrieb Leo Baumann:
1.) Balanis/Dipol/vakuum -> lenght1 2.) lenght=lenght1/sqrt(epsilon_r_effective)The balun You will find here
have fun :)
Thanks a lot for the very helpful point about impedance matching with the balun. since the two microstrip dipole arms must have 180 degree out of phase current in them. Somehow I had missed it initially.
w is 2*PI*f here
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