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. Aug 2015 8:42, 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

RF Thermoablation in a Human Liver using the Bioheat Formulation in CST STUDIO SUITE

RF Thermoablation in a Human Liver using the Bioheat Formulation in CST STUDIO SUITE
This article is concerned with the evaluation of the temperature distribution inside a human liver when a catheter is inserted. It summarises the simulations performed with the HUGO and University of L'Aquila's ALES anatomical models. The co-simulation procedure using both CST MICROWAVE STUDIO® (CST MWS) and CST EM STUDIO® (CST EMS) is also described. With permission and courtesy of the University of L'Aquila, Italy. Read full article..

Test Equipment Plus develops high-performance custom filters with CST MICROWAVE STUDIO

Test Equipment Plus develops high-performance custom filters with CST MICROWAVE STUDIO Document type
The Signal Hound® product line from Test Equipment Plus comprises a series of compact, lightweight, and affordable spectrum analyzers. The Signal Hound equipment is built on the design philosophy of maximizing performance while minimizing cost, and as well as having a wide range of applications for general engineering labs, it has also found success in fields ranging from telecoms and spectrum monitoring to aerospace and defense. Read full article..

Vivaldi Antenna

Vivaldi Antenna
Microwave Engineering Europe's (MWEE) EM simulation benchmark has become quite a tradition over the last few years, enticing some of the best known software providers to put their diverse simulation methods to the test. Read full article..

Thermal Analysis of a Two-Cavity Dual-Mode Bandpass Filter

Thermal Analysis of a Two-Cavity Dual-Mode Bandpass Filter
The CST EM STUDIO™ Thermal Solver has been applied to simulate the temperature distribution of a dual-mode filter. The current density distribution inside the lossy conductive metals is precomputed by CST MICROWAVE STUDIO® acting as the thermal source. Read full article..

Modeling and Measurement of Shielding Enclosures

Modeling and Measurement of Shielding Enclosures
The shielding effectiveness (SE) of an enclosure has been simulated by using the CST MICROWAVE STUDIO® (CST MWS) and then compared to measurement from a known reference case. Read full article..
Back Back  

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