Terminator3
Advanced Member level 3
- Joined
- Feb 25, 2012
- Messages
- 802
- Helped
- 71
- Reputation
- 142
- Reaction score
- 63
- Trophy points
- 1,308
- Activity points
- 9,027
Hello all! I have used calculators, such as
https://www.emtalk.com/mpacalc.php?...Lmm&Wa=6.1&W_units_list=Wmm&Rin=93.1506262859
and
https://www.everythingrf.com/rf-calculators/microstrip-patch-antenna-calculator
And some formulas from papers on patch antenna. It worked nice for 2.4GHz, and simulation gived the same center frequency.
Now trying to simulate log-periodic patch array, but at high frequencies (10 to 20GHz) i have problem to calculate center frequency using formulas/calculators. Is it true, that for thick substrates, for example 2mm and Er=4, this formulas are not very accurate? Simulation and formula sizes differs for few mm! Not even 0.1 of mm.
https://www.emtalk.com/mpacalc.php?...Lmm&Wa=6.1&W_units_list=Wmm&Rin=93.1506262859
and
https://www.everythingrf.com/rf-calculators/microstrip-patch-antenna-calculator
And some formulas from papers on patch antenna. It worked nice for 2.4GHz, and simulation gived the same center frequency.
Now trying to simulate log-periodic patch array, but at high frequencies (10 to 20GHz) i have problem to calculate center frequency using formulas/calculators. Is it true, that for thick substrates, for example 2mm and Er=4, this formulas are not very accurate? Simulation and formula sizes differs for few mm! Not even 0.1 of mm.