I read several research papers in antenna theory and I see that they talking in terms of inductance or capacitance by making equivalent circuit. Is there any provision in HFSS to obtain the equivalent circuit of our patch?
Kindly share your views.
No
there is no such kind of provision in HFSS.
They are analyzed theoritically according to lengths and widths in terms of inductor and capacitor
.
Thanks Naveen and Anvesh for the reply. But can anyone tell me how do make the equivalent circuit as we have N number of configurations of microstrip antennas like fractals, slot antenna, electromagnetic band gap structures? In almost every research papers of reputed journals, I have seen the equivalent circuit which they use for explaining propagating modes, impedance etc.
Please help me for that.
well the equivalent circuit for a patch is a parallel LC circuit..any LC circuit will resonate at a particular frequency and so does the patch
Hi, good question the most useful simulator to create the equivalent circuit is ADS
ADS can help you to design yrs structures (patches, EBG, AMC, FSS)
Good Luck
You can not get equivalent circuit of a patch antenna from HFSS directly. You need to establish a circuit using ADS. The circuit consists of a parallel R L & C and two tank circuit which is equivalent to the radiating patches and consists of capacitive susceptance and a conductance. You need to calculate the inductance, resistance and capacitance using the formulae provided in the antenna design handbook by R. Garg. You can also calculate the conductance and susceptance by the formulae provided in antenna book by C. A. Balani. After getting all the theoretical values you can design the circuit using ADS. I think you need to tune the parameters to get optimized result. Now you can export the data from ADS and HFSS and compare the S11 of both the circuit simulation and design simulation. You can use the origin or Microsoft excel to plot both the graph together.
ADS can help you to form equivalent circuits of antennas. One should find the operating frequency of the antenna. This frequency will be the resonance frequency of the parallel LC equivalent circuit. For wide band or multi-band antennas more than one LC circuit are needed. Other details can be found in:
1-Khalil H. Sayidmarie, and Likaa S. Yahya," Modeling of Dual-Band Crescent-Shape Monopole Antenna for WLAN Applications", International Journal of Electromagnetics and Applications 2014, 4(2): PP 31-39.
Thank you so much Khalil and Wriddhi. I'll definitely try this with ADS.
I agree with the others that ADS can help you to create an equivalent circuit for patch antenna
Thank you Khalil and Wriddhi for the inputs.
Thanks Munish Kumar for the question
It helps me
you can return to the following papers:
1- K. H. Sayidmarie, and L. S. Yahya, "Modeling of dual-band crescent-shape monopole antenna for WLAN applications", International Journal of Electromagnetics and Applications, Vol.4, No.2, PP.31-39,2014. Doi:10.5923/j.ijea.20140402.01
2- K. H. Sayidmarie, and L. S. Yahya, "Analysis design and modeling of a crescent antenna for UWB applications", Sixth International Conference on Internet Technologies & Applications, 8-11September 2015, Wales, UK.
DOI: 10.1109/ITechA.2015.7317444
Hello mr wriddish please can you help me with how to go about the calculations because i ddint get the book you are talking about
Ghanshyam singh please how can i get the E-copy can you help me with the link?
This papers may also help you:
Typical Approach of Modeling Lumped Equivalents for Narrowband Antennas
Lumped equivalent models of narrowband antennas and isolation enhancement in a three antennas system.
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