Affiliated with the
Communication & Space
Sciences Laboratory

Nature Inspired Antenna Design

Miniature Antennas

Miniaturized Linear Stochastic Dipole Antenna

Credit card sized 916 MHz AM transmitter with components directly-written on glass
including a miniature 50 Ohm stochastic dipole antenna

Miniaturized 915 MHz Credit Card Sized Stochastic
Crossed-Dipole RFID Tag Antenna

Prototype of a monopole version of an End-Loaded Planar Open Sleeve
Dipole (ELPOSD) that was designed for wideband operation at 1 GHz


Completed prototype of the antenna situated above a ground plane



..: References :..

1-) A New Design Methodology for Genetically Engineered Stochastic Antennas

2-) A Design Optimization Methodology for Multiband Stochastic Antennas
by P.L. Werner and D.H. Werner
2002 IEEE International Symposium on Antennas and Propagation, San Antonio, Texas, June 16-21.

3-) Novel Design Techniques for Miniature Circularly-Polarized Antennas Using Genetic Algorithms
by P. L. Werner, M. J. Wilhelm, R. T. Salisbury, L. D. Swann, and D. H. Werner
2003 IEEE International Symposium on Antennas and Propagation. Columbus, Ohio, June 22-27.

4-) A Planar Spiral Balun Applied to a Miniature Stochastic Dipole Antenna
by K. O’Connor, R. Libonati, J. Culver, D.H. Werner and P.L. Werner
2003 IEEE International Symposium on Antennas and Propagation. Columbus, Ohio, June 22-27.

5-) The Design Optimization of Miniature Low-Profile Antennas Placed in Close Proximity to High-Impedance Surfaces
by D. H. Werner and P. L. Werner
2003 IEEE International Symposium on Antennas and Propagation. Columbus, Ohio, June 22-27.

6-) Design Synthesis of Miniature Multiband Monopole Antennas With Application to Ground-Based and Vehicular Communication Systems
by P. L. Werner, and D. H. Werner
IEEE Antennas and Wireless Propagation Letters , Vol. 4, pp. 104-106, 2005.

ABSTRACT: In this letter, we present a novel design methodology for miniature multiband monopole and whip-type antennas. The miniaturization and multiband response are simultaneously achieved by placing a fixed number of thin stubs at strategic locations along the antenna. A robust genetic algorithm technique is introduced to determine the optimal lengths and locations of the stubs for a specified percent reduction in monopole length.

7-) The Design of Miniature Three-Element Stochastic Yagi-Uda Arrays Using Particle Swarm Optimization
by Zikri Bayraktar, P. L. Werner and D. H. Werner
IEEE Antennas and Wireless Propagation Letters. Volume 5, Issue 1, pp. 22 - 26, Dec 2006.

ABSTRACT: A fixed grid structure of reduced length is employed to generate three-element miniature stochastic Yagi-Uda arrays. Particle swarm optimization (PSO) is utilized to alter the shape and the element distances for optimum forward gain, good front-toback ratio, and 2:1 or better voltage standing wave ratio (VSWR). Simulation results of PSO are compared with binary valued genetic algorithm (GA) optimized designs and with a conventional threeelement Yagi-Uda array.

8-) GA Design of Small Thin-Wire Antennas: Comparison With Sierpinsky-Type Prefractal Antennas
by M. Fernández Pantoja, F. García Ruiz, A. Rubio Bretones, S. González García, R. Gómez Martín, J. M. González Arbesú, J. Romeu, J. M. Rius, P. L. Werner, and D. H. Werner
IEEE Transactions on Antennas and Propagation VOL. 54, NO. 6, pp. 1879- 1882, JUNE 2006

ABSTRACT: A new set of genetically generated electrically small thin-wire antennas with a better performance than that of several families of Sierpinsky prefractal monopoles of the same electrical size at resonance is presented.

9-) A Novel Miniature Broadband/Multiband Antenna Based on an End-Loaded Planar Open-Sleeve Dipole
by Thomas G. Spence, and Douglas H. Werner
IEEE Transcations on Antennas and Propagation, Vol. 54, No. 12, pp. 3614 - 3620, December 2006.

ABSTRACT: Open-sleeve dipoles are versatile antennas primarily because they have several design parameters that can be varied to achieve a wide range of VSWR performance and operating bandwidth. By properly adjusting their parameters, it is possible to create versions of these antennas that have either a broadband or a dual-band response. In this paper, a new variation of the conventional open-sleeve dipole antenna is introduced, which we call an end-loaded planar open-sleeve dipole (ELPOSD). This configuration provides a degree of miniaturization while retaining a comparable bandwidth in terms of the VSWR response to that of conventional open-sleeve dipoles. Several designs are presented for the conventional and end-loaded configurations that demonstrate the VSWR and miniaturization capabilities of this class of antennas. Measured results have been compared with simulations and found to be in good agreement for an end-loaded planar open-sleeve monopole.

10-) Broadband, Miniaturized Stacked-Patch Antennas for L-Band Operation Based on Magneto-Dielectric Substrates
by Farhad Namin, Thomas G. Spence, Douglas H. Werner, and Elena Semouchkina
IEEE Transcations on Antennas and Propagation, Vol. 58, No. 9, pp. 2817 - 2822, September 2010.

ABSTRACT: Design of stacked-patch antennas using magneto-dielectric substrates was investigated. In particular, special types of substrates with identical relative permittivity and permeability were considered. The optimal design parameters were determined using a genetic algorithm. It will be shown that by employing these matched magneto-dielectric substrates, a significant miniaturization of up to 60% can be achieved while providing a large operating bandwidth (20%). Several design examples were considered and their performance was evaluated using a full-wave analysis technique based on the method of moments. The tradeoff between antenna gain and degree of miniaturization for a fixed bandwidth was also investigated. A fabrication methodology for obtaining the required matched magneto-dielectric substrate materials is also proposed.

11 -) Robust Low-profile Metasurface-Enabled Wearable Antennas for Off-Body Communications
by Zhi Hao Jiang and Douglas H. Werner
Proceedings of The 8th European Conference on Antennas and Propagation (EuCAP), The Hague, The Netherlands, 6-11 April 2014.

ABSTRACT: This paper presents a low-profile metasurface- enabled wearable antenna operating in the newly released medical wireless body-are network (MBAN) band from 2.36 to 2.40 GHz for off-body communications. The performance of the antenna was made possible by the introduction of a properly designed anisotropic metasurface which consists of only a 2 by 2 array of I-shaped resonating elements. Together with the finite- sized metallic ground plane on the back of the metasurface, it provides a +90° reflection phase band to achieve the desired impedance matching for the planar monopole feed above the metasurface. The integrated antenna was fabricated and characterized, showing a strong correspondence between simulated and measured results. The resulting antenna has a remarkably low profile of only one-fiftieth of the operating wavelength, all while achieving a 5.5% -10 dB impedance bandwidth from 2.30 to 2.43 GHz, a gain of around 6.2 dBi, and a font-to-back ratio higher than 23 dB, thus making it a promising candidate for incorporation into various wearable systems.

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