Gaussian Process Modeling of CPW-Fed Slot Antennas

Abstract

Abstract-Gaussian process (GP) regression is proposed as a structured supervised learning alternative to neural networks for the modeling of CPW-fed slot antenna input characteristics. A Gaussian process is a stochastic process and entails the generalization of the Gaussian probability distribution to functions. Standard GP regression is applied to modeling S 11 against frequency of a CPW-fed secondresonant slot dipole, while an approximate method for large datasets is applied to an ultrawideband (UWB) slot with U-shaped tuning stub -A challenging problem given the highly non-linear underlying function that maps tunable geometry variables and frequency to S 11 / input impedance. Predictions using large test data sets yielded results of an accuracy comparable to the target moment-method-based full-wave simulations, with normalized root mean squared errors of 0.50% for the slot dipole, and below 1.8% for the UWB antenna. The GP methodology has various inherent benefits, including the need to learn only a handful of (hyper) parameters, and training errors that are effectively zero for noise-free observations. GP regression would be eminently suitable for integration in antenna design algorithms as a fast substitute for computationally intensive full-wave analysis.

A Triple-Band Bow-Tie-Shaped CPW-Fed Slot Antenna for Wlan Applications

“…Many authors have contributed significantly to the study of CPW-fed slot antennas [1][2][3][4][5][6][7][8]. In [1], the proposed broadband antennas, a new quasi-metallic-wall technique for improving the gain of CB-CPW single antenna and arrays, are presented as having desirable features for UWB applications.…”

“…A simple and compact ultra wide-band (UWB) aperture antenna is obtained with a promising performance. In [2], a CPW-fed, Gaussian process (GP) regression is proposed as a structured supervised learning alternative to neural networks for the modeling of antenna input characteristics. In [3], a broadband printed CPW-fed circular slot antenna composed of a circular slot fed with a 50 Ω CPW line through a circular patch is presented.…”

Analysis and Design of Bowtie Antenna with Different Shapes and Structures

“…Similarly, for practical design of microstrip patch antenna, it is essential that the ground plane should be greater than the actual patch dimensions by about six times the substrate thickness [14][15][16]. Thus, the dimensions of the ground plane may be given as…”

“…In aperature coupled feeding, the radiating patch is etched on the top of the antenna substrate and feed line is etched on the bottom of substrate. The thickness and dielectric constants of these two substrates may thus be chosen independently to optimize the distinct electrical functions of radiation and circuitry [15] [ 16].…”

Circular Microstrip Slot Antenna for Dual-Frequency Rfid Application

“…A number of techniques to overcome the limitation have been suggested to provide the characteristics of wideband antenna including increase of substrate thickness, slotted patch antenna or stacked shorted patches [3][4][5][6][7][8][9][10][11][12][13][14][15]. Many investigation associated to microstrip slot antennas have been reported [16][17][18][19][20][21][22][23].…”