CST

Patch Antenna Array

Interference

Antenna Arrays like this can be studied efficiently using CST MICROWAVE STUDIOs postprocessing engine. Near- and farfield combinations for arbitrary amplitudes and phase angles at each input port can be calculated in seconds. The calculation of one patch antenna in the time domain requires about ten minutes with MICROWAVE STUDIOs transient solver.


Circular patch antenna array
Figure 1: Circular patch antenna array

The antenna array consists of four circular patches, each of which are excited by a coaxial feed, placed slightly off-center. The front corner has been cut away in order to show the coaxial feed.


Destructive Interference
Figure 2: Destructive Interference


Constructive Interference
Figure 3: Constructive Interference


CST Article "Patch Antenna Array"
last modified 12. Dec 2006 12:12
printed 30. Jun 2015 11:22, Article ID 9
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

2 of 3 people found this article useful

Did you find this article useful?

Other Articles

Integrated Antenna Design for a GSM Tracking Device

Integrated Antenna Design for a GSM Tracking Device
A common strategy when designing an electronic communication device is to use an off-the-shelf antenna. Although the ease with which such antennas can be obtained is a certain benefit, the designer is limited to commercially available antennas which may not be of the right shape for the application, and when purchased in bulk, could become quite costly. In this webinar we aim to illustrate, through demonstration of a real world example, how an existing chip antenna on a GSM tracking device designed to monitor the acceleration (and thus level of distress) of sheep, can be replaced by an embedded, integrated antenna. The final design shows improved antenna performance and communication range while adhering to the technical and spatial requirements. In addition, its planar nature allows it to be integrated with the existing PCB layout, resulting in reduced manufacturing and assembly time and costs. The webinar will show how the design capabilities of Antenna Magus, a searchable database of antennas, can be combined with the full-wave 3D electromagnetic simulation tools in CST STUDIO SUITE to create an embedded design, where full coupling in a complex environment can be taken into account Read full article..

Design und Bewertung einer Hohlleiter-Schlitzantenne (Slotted Waveguide Antenna,SWA) mit EM-Simulation

Design und Bewertung einer Hohlleiter-Schlitzantenne (Slotted Waveguide Antenna,SWA) mit EM-Simulation
SWAs sind für viele Radaranwendungen nützlich. Sie sind leicht, robust und bieten einen hohen Gewinn und eine sehr gute Richtcharakteristik. Dabei sind sie relativ einfach herzustellen. SWAs bestehen aus einem Hohlleiter, dessen Wand durch Schlitze unterbrochen ist. Read full article..

Designing a Band Notch Filter for a UWB Antenna Using CST MWS

Designing a Band Notch Filter for a UWB Antenna Using CST MWS Document type
Ad Reniers, Technical University Eindhoven High-data-rate wireless communications need wide bandwidths. In the Ultra-Wideband (UWB) frequency band from 3.1 GHz to 10.6 GHz, information may be spread over a large bandwidth at low power levels thus creating the possibility to share the spectrum with other users. To prevent interference with existing wireless systems, like IEEE 802.11a WLAN, stop band characteristics are required from 5 GHz to 6 GHz*. The notch filter function is designed in a low-cost circular planar dipole antenna based on the ‘two-penny’ dipole. To achieve the required specifications for this notch function we used first the CST optimizer. After that we optimized systematic the design. In this presentation we want to show the results of both approaches to achieve a maximum result and try to understand the working of this notch and spur function in this compact UWB antenna. * Paper: Low-cost, compact UWB antenna with frequency band-notch function. H.J. Visser. Read full article..

Terahertz broadband metal-dielectric near-field antenna

Terahertz broadband metal-dielectric near-field antenna
The article presents an antenna-based approach to near-field imaging and spectroscopy, which can be used for both continuous-wave and pulsed broadband electromagnetic radiation from microwave to terahertz frequencies. CST MICROWAVE STUDIO® (CST MWS) was used to perform the simulations. Read full article..

The use of CST Microwave Studio in the Design of an X-Band Circularly Polarised Splashplate Antenna

The use of CST Microwave Studio in the Design of an X-Band Circularly Polarised Splashplate Antenna Document type
Richard Roberts, Astrium Ltd This presentation describes how CST Microwave Studio (MWS) has been used in conjunction with POS 5 and GRASP 8 to design an X-Band circularly polarised Splashplate Antenna. The antenna essentially consists of a centre fed reflector (17 wavelengths in diameter), the Splashplate feed (~2 wavelengths in diameter), and a septum polariser to allow the Tx and Rx bands to operate in opposite polarisations. A significant factor in the design is that a short circuit had to be assumed at the other port of the septum polariser meaning that the return loss of the Splashplate feed and the reflector were critical to the axial ratio performance. CST MWS enabled this aspect of the design to be modelled and analysed using the T-solver. Comparison of the measured and predicted antenna performance has validated the design process. Although a compliant performance has been achieved, it is evident that some modelling improvements could be sought in order to get a better convergence between prediction and measurement. Read full article..
Back Back  

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