ANN Synthesis Model of Single-Feed Corner-Truncated Circularly Polarized Microstrip Antenna with an Air Gap for Wideband Applications

A computer-aided design model based on the artificial neural network (ANN) is proposed to directly obtain patch physical dimensions of the single-feed corner-truncated circularly polarized microstrip antenna (CPMA) with an air gap for wideband applications. To take account of the effect of the air gap, an equivalent relative permittivity is introduced and adopted to calculate the resonant frequency and -factor of square microstrip antennas for obtaining the training data sets. ANN architectures using multilayered perceptrons (MLPs) and radial basis function networks (RBFNs) are compared. Also, six learning algorithms are used to train the MLPs for comparison. It is found that MLPs trained with the Levenberg-Marquardt (LM) algorithm are better than RBFNs for the synthesis of the CPMA. An accurate model is achieved by using an MLP with three hidden layers. The model is validated by the electromagnetic simulation and measurements. It is enormously useful to antenna engineers for facilitating the design of the single-feed CPMA with an air gap.

[1]  Rabindra K. Mishra,et al.  Neural network-based CAD model for the design of square-patch antennas , 1998 .

[2]  Zhongbao Wang,et al.  An Inmarsat BGAN Terminal Patch Antenna Array With Unequal Input Impedance Elements and Conductor-Backed ACPW Series-Feed Network , 2012, IEEE Transactions on Antennas and Propagation.

[3]  Kwai-Man Luk,et al.  Design and Study of Wideband Single Feed Circularly Polarized Microstrip Antennas , 2008 .

[4]  Xianming Qing,et al.  A Universal UHF RFID Reader Antenna , 2009, IEEE Transactions on Microwave Theory and Techniques.

[5]  Seref Sagiroglu,et al.  Neural Models for the Resonant Frequency of Electrically Thin and Thick Circular Microstrip Antennas and the Characteristic Parameters of Asymmetric Coplanar Waveguides Backed with a Conductor , 2002 .

[6]  M. Kara.  The resonant frequency of rectangular microstrip antenna elements with various substrate thicknesses , 1996 .

[7]  Yanjun Zhang,et al.  Design of Multilevel Sequential Rotation Feeding Networks Used for Circularly Polarized Microstrip Antenna Arrays , 2012 .

[8]  Liang Xu,et al.  Modified Dual-Band Stacked Circularly Polarized Microstrip Antenna , 2013 .

[9]  S. M. Kim,et al.  Single feed wideband circular polarised patch antenna , 2007 .

[10]  Pramod Kumar Singhal,et al.  Microstrip antenna design using artificial neural networks , 2010 .

[11]  Yong-xin Guo,et al.  Wideband Circularly Polarized Patch Antenna Using Broadband Baluns , 2008, IEEE Transactions on Antennas and Propagation.

[12]  Zhongbao Wang,et al.  Single-Fed Broadband Circularly Polarized Stacked Patch Antenna With Horizontally Meandered Strip for Universal UHF RFID Applications , 2011, IEEE Transactions on Microwave Theory and Techniques.

[13]  Tulay Yildirim,et al.  Artificial Neural Design of Microstrip Antennas , 2006 .

[14]  K. Güney,et al.  Comparison of Neural Networks for Resonant Frequency Computation of Electrically Thin and Thick Rectangular Microstrip Antennas , 2001 .

[15]  Erik O. Hammerstad,et al.  Equations for Microstrip Circuit Design , 1975, 1975 5th European Microwave Conference.

[16]  K. Gupta,et al.  Analysis and optimized design of single feed circularly polarized microstrip antennas , 1983 .

[17]  Gang Liu,et al.  Closed form expressions for resonant frequency of rectangular patch antennas with multidielectric layers , 1994 .

[18]  Zhongbao Wang,et al.  Dual-Band Probe-Fed Stacked Patch Antenna for GNSS Applications , 2009, IEEE Antennas and Wireless Propagation Letters.

[19]  K. Guney,et al.  A Hybrid Method Based on Combining Artificial Neural Network and Fuzzy Inference System for Simultaneous Computation of Resonant Frequencies of Rectangular, Circular, and Triangular Microstrip Antennas , 2009, IEEE Transactions on Antennas and Propagation.

[20]  Qi-Jun Zhang,et al.  Neural Network Inverse Modeling and Applications to Microwave Filter Design , 2008, IEEE Transactions on Microwave Theory and Techniques.

[21]  Misao Haneishi,et al.  A design method of circularly polarized rectangular microstrip antenna by one‐point feed , 1981 .

[22]  ThakareVandana Vikas,et al.  Microstrip antenna design using artificial neural networks , 2010 .

[23]  Kin‐Lu Wong,et al.  Low-cost broadband circularly polarized patch antenna , 2003 .

[24]  Xianming Qing,et al.  A Broadband Circularly Polarized Stacked Probe-Fed Patch Antenna for UHF RFID Applications , 2007 .

[25]  J. S. Dahele,et al.  Circular-disk microstrip antenna with an air gap , 1984 .

[26]  Filiz Güneş,et al.  Artificial neural networks in their simplest forms for analysis and synthesis of RF/microwave planar transmission lines , 2005 .

[27]  Qiang Wang,et al.  An ANN-Based Synthesis Model for the Single-Feed Circularly-Polarized Square Microstrip Antenna With Truncated Corners , 2012, IEEE Transactions on Antennas and Propagation.