CST

A Multi-Frequency Microstrip-fed Annular-Slot Antenna

This note describes a multi frequency annular slot antenna. The design is based on the paper: “A Multi-frequency Microstrip-fed Annular Slot Antenna” by Hooman Tehrani and Kai Chang. The entire structure is defined parametrically to allow optimisation and parametric studies. The setup process in CST MICROWAVE STUDIO® takes about 10 to 15 min for an experienced user.


Design of the Annular Slot Antenna. To allow optimisation the entire structure is defined parametrically.
Figure 1: Design of the Annular Slot Antenna. To allow optimisation the entire structure is defined parametrically.

The substrate has a thickness of 0.762 mm and a dielectric constant of 2.45. The width of the 50 Ohm Microstrip line is 2.16 mm. All other dimesions can be found in following table. All values are in mm.


Parameter definition. All values are in mm
Figure 2: Parameter definition. All values are in mm

Calculation Results

The simulation results agree very well with the published results (Figure 3). Several slot resonances are excited. The simulated resonance frequencies are at 3.5 GHZ, 4.5 GHz and 6.5 GHz respectively.


Comparison of published and MWS Results.
Figure 3: Comparison of published and MWS Results.


Radiation Pattern at 3.5 GHz, 4.5 GHz and 6.5 GHz
Figure 4: Radiation Pattern at 3.5 GHz, 4.5 GHz and 6.5 GHz


CST Article "A Multi-Frequency Microstrip-fed Annular-Slot Antenna"
last modified 28. Feb 2008 10:42
printed 31. Jul 2015 5:18, Article ID 52
URL:

All rights reserved.
Without prior written permission of CST, no part of this publication may be reproduced by any method, be stored or transferred into an electronic data processing system, neither mechanical or by any other method.

Feedback

This article has not been voted yet

Did you find this article useful?

Other Articles

Mobile Phone Simulations with Human Head and Hand Models

Mobile Phone Simulations with Human Head and Hand Models
Human head models like the SAM phantom are already regularly used to test the influence on mobile phone performance as well as to check the compliance to SAR standards. However, the hand also influences the field distribution significantly. The following article shows the CST MICROWAVE STUDIO® (CST MWS) simulation results of a complete Sony Ericsson mobile phone in relation to head and hand phantoms. Read full article..

MEMS Comb Sensor

MEMS Comb Sensor
The article describes the simulation of a MEMS comb sensor using CST EM STUDIO™. First different shapes of the combs are discussed. Using CST EMS's efficient mesh scheme, the full structure was also simulated. Read full article..

Signal integrity analysis and circuit extraction of a mounted SMA connector

Signal integrity analysis and circuit extraction of a mounted SMA connector Document type
A physically based method is used for estimating the equivalent circuit model of an SMA connector soldered on the top plane of a multi-layer board and connected to a single-end stripline. Starting from the scattering parameters (S-parameters) evaluated using a simulation software package, the equivalent circuit is extracted by modeling each part of the structure. The circuit is then validated by comparing the outputs obtained via circuit-level simulation of the extracted physical circuit with those computed by means of the full wave solution. Read full article..

Optimizing antenna design and placement in MIMO systems

Optimizing antenna design and placement in MIMO systems Document type
J.Fejfar, CST of America. Video of a webinar presentation (Running time: 11 min) Read full article..

Dichroic Filter

Dichroic Filter
The dichroic filter is an example for setting up simulations of frequency selective surfaces. The simulation is performed with CST MICROWAVE STUDIO® and compared to measurements. Read full article..
Back Back  

Your session has expired. Redirecting you to the login page...