# מערך אנטנות בקיטוב מעגלי

שלחו לחבר
שנה
2015

#### Circulary Polarized Antenna Array

תיאור הפרויקט:

One of the problems of circularly polarized antenna antenna arrays is the high axial ratio which is the result of the inherent asymmetry of the radiating element. One method of solving this problem is by implementing a technique known as "sequential rotation". This technique   electrically compensates for the inherent asymmetry of the radiating element without physically modifying its structure.

In this project the students will design  a computer model and build  a prototype of two small antenna arrays consisting of circularly polarized printed circuit radiating elements . The first model will be a standard printed circuit antenna array. In the second array they will implement the "sequential rotation" technique.

תכולת הפרויקט:

The students will design  a computer model and build a working prototype of two  printed circuit antenna arrays.

1.  The first  model will be a standard printed circuit antenna array without using the the "sequential rotation" technique.  The students will design and simulate  the antenna patterns and axial ratio of the printed circuit antenna array.

2.  The second model will be an antenna array using  the sequential rotation technique in which the students will design a  computer model of the same antenna array but this time they will implement the "sequential rotation" technique. They will then  compare the  simulation results  of the two computer models.

3. After completing the simulation work, the  students will then build two printed circuit antenna arrays prototypes. The first prototype will be the standard printed circuit array. The second array will be an antenna array using  the "sequential rotation" technique.

4. The two arrays will then be measured in an antenna anechoic chamber and the results will be compared.

The computer model will be done with a CAE (Computer aided-engineering program) program known as CST.

In his project, the students, in addition to learning how  to design computer  simulation models of antennas  will have the opportunity to become  familiar with basic antenna  and polarization theory.  They will also be become acquainted with the process  of transforming  a computer model into an actual prototype.

Finally, they will have the opportunity learn how to measure an antenna in an anechoic chamber and to learn how to interpret their results.

דרישות:

1. Basic Electromagnetic Analysis
2. Transmission Line Theory

בשיתוף עם: Elta/IAI

מקורות:

1. "Broadband Circularly Polarized Microstrip Antenna
Array Using Sequentially Rotated Technique".
Yong-Jin Hu, Wei-Ping Ding, and Wen-Quan Cao, IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, VOL. 10, 2011.

2.  CST Program : https://www.cst.com/Products/CSTMWS

דוא"ל: rbauer@elta.co.il

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