Physical description 
1 electronic text (xi, 136 pages) : illustrations, digital file. 

polychrome rdacc 
Series 
Synthesis lectures on antennas, 19326084 ; # 11.


Synthesis digital library of engineering and computer science.


Synthesis lectures on antennas ; # 11. 19326084.

Notes 
Part of: Synthesis digital library of engineering and computer science. 

Series from website. 
Bibliography 
Includes bibliographical references (pages 121134). 
Contents 
1. Introduction to reconfigurable antennas  1.1 Introduction  1.2 Reconfiguration techniques and classifications of reconfigurable antennas  1.3 Electrically reconfigurable antennas  1.3.1 Reconfigurable antennas based on RFMEMS  1.3.2 Reconfigurable antennas based on PIN diodes  1.3.3 Reconfigurable antennas based on varactors  1.4 Reconfigurable antennas applications and requirements  

2. Graph modeling reconfigurable antennas  2.1 Introduction  2.2 Introduction to graphs  2.2.1 What is a graph?  2.2.2 The properties of a graph  2.2.3 The adjacency matrix representation of a graph  2.2.4 Walks and paths in a graph  2.3 Rules and guidelines for graph modeling reconfigurable antennas  2.4 Applying graph algorithms on reconfigurable antennas  2.4.1 Applying Dijkstra's algorithm to the control process of reconfigurable antennas  2.5 Discussion  

3. Reconfigurable antenna design using graph models  3.1 Introduction  3.2 Proposed reconfigurable antenna design steps  3.2.1 Summary of the proposed design technique  3.3 Example of designing a reconfigurable antenna using the proposed iterative design steps  3.4 Discussion  

4. Redundancy reduction in reconfigurable antenna structures  4.1 Introduction  4.2 Antenna structure redundancy reduction  4.2.1 The total number of edges in a complete graph  4.2.2 Deriving equations for redundancy reduction in multipart antennas  4.2.3 Deriving equations for redundancy reduction in singlepart antennas  4.2.4 Deriving equations for redundancy reduction in antennas resorting to mechanical reconfiguration methods  4.2.5 A chart representation of the redundancy reduction approach  4.3 Examples  4.4 Discussion  

5. Analyzing the complexity and reliability of switchfrequency reconfigurable antennas using graph models  5.1 Introduction  5.2 Graph modeling equivalent antenna configurations  5.3 Reliability formulation for frequency reconfigurable antennas  5.4 General complexity of reconfigurable antennas  5.5 Correlation between complexity and reliability of reconfigurable antennas  5.6 Increasing the reliability of reconfigurable antennas  5.7 Reliability assurance algorithm  5.8 Discussion  

6. Complexity versus reliability in arrays of reconfigurable antennas  6.1 Introduction  6.2 The graph modeling of arrays of reconfigurable antennas  6.3 Correlation between complexity and reliability  6.3.1 The general complexity of reconfigurable antenna arrays  6.3.2 The frequency dependent complexity and the correlation with reliability  6.4 The configuration complexity and the prioritization of frequencydependent configurations  6.5 Practical design aspects  6.6 Discussion  

7. Detection and correction of switch failures in switch reconfigurable antenna arrays  7.1 Introduction  7.2 Detection of switch failures in reconfigurable antenna arrays  7.2.1 Sensing points technique  7.2.2 Sensing lines technique  7.3 Comparison between the two detection techniques  7.4 Overcoming switch failures in reconfigurable antenna arrays using frequencydependent graphs  7.5 Discussion  

8. Conclusion  Bibliography  Authors' biographies. 
Restrictions 
Abstract freely available; fulltext restricted to subscribers or individual document purchasers. 
Summary 
This lecture discusses the use of graph models to represent reconfigurable antennas. The rise of antennas that adapt to their environment and change their operation based on the user's request hasn't been met with clear design guidelines. There is a need to propose some rules for the optimization of any reconfigurable antenna design and performance. Since reconfigurable antennas are seen as a collection of selforganizing parts, graph models can be introduced to relate each possible topology to a corresponding electromagnetic performance in terms of achieving a characteristic frequency of operation, impedance, and polarization. These models help designers understand reconfigurable antenna structures and enhance their functionality since they transform antennas from bulky devices into mathematical and software accessible models.The use of graphs facilitates the software control and cognition ability of reconfigurable antennas while optimizing their performance. This lecture also discusses the reduction of redundancy, complexity and reliability of reconfigurable antennas and reconfigurable antenna arrays. The full analysis of these parameters allows a better reconfigurable antenna implementation in wireless and space communications platforms. The use of graph models to reduce the complexity while preserving the reliability of reconfigurable antennas allow a better incorporation in applications such as cognitive radio, MIMO, satellite communications,and personal communication systems. A swifter response time is achieved with less cost and losses.This lecture is written for individuals who wish to venture into the field of reconfigurable antennas,with a little prior experience in this area,and learn how graph rules and theory,mainly used in the field of computer science, networking, and control systems can be applied to electromagnetic structures.This lecture will walk the reader through a design and analysis process of reconfigurable antennas using graph models with a practical and theoretical outlook. 
Other formats 
Also available in print. 
System notes 
Mode of access: World Wide Web. 

System requirements: Adobe Acrobat Reader. 
Notes 
Title from PDF t.p. (viewed on August 14, 2013). 
Other author 
Tawk, Youssef.


Christodoulou, Christos G., 1955

Subject 
Antennas (Electronics)  Design and construction.


reconfigurable antennas. 

reconfigurable systems. 

graph theory. 

graph models. 

switches. 

redundancy. 

complexity. 

switch reliability. 

reconfigurable antenna arrays. 

switch failure. 
Standard Number 
10.2200/S00515ED1V01Y201306ANT011 
ISBN 
9781627050258 (electronic bk.) 

9781627050241 (paperback) 