Frequency And Pattern Reconfigurable Slot Antenna

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Design Of Frequency- And Pattern-reconfigurable Wideband Slot Antenna
Frequency And Pattern Reconfigurable Slot Antennas
Pattern And Frequency Reconfigurable Annular Slot Antenna Using Pin Diodes
Frequency And Pattern Reconfigurable Slot Antenna System

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Reconfigurable antennas can address complex system requirements by modifying their geometry and electrical behavior, thereby adapting to changes in environmental conditions or system requirements (i.e., enhanced band-width, changes in operating frequency, polarization, and radiation pattern). A wideband slot antenna with frequency- and pattern-reconfigurable characteristics for TD-LTE (3.4–3.8 GHz) and C-band (3.7–4.2 GHz) applications is proposed. The antenna consists of two symmetric slots that are fed by a fork-shaped microstrip line. Two PIN diodes are loaded in the slots to produce two different frequency bands. A slot antenna having the characteristics of frequency and the pattern reconﬁgurability using PIN diodes is reported in. The antenna uses two switches on the slot to produce multiple resonant bands, while the four slits along with the switches produce pattern.

2010 IEEE Antennas and Propagation Society International Symposium>1 - 4

Abstract

A pattern reconfigurable U-slot antenna on a microwave substrate is presented. The antenna consists of a U-slot patch and eight shorting posts. Each edge of the square patch is connected to two shorting posts by PIN diodes. By switching between the different states of the PIN diodes, the proposed antenna can radiate boresight or conical patterns; moreover, the position of the main lobes of the conical pattern can also be changed between two orthogonal planes of the conical beam. The predicted overlapping impedance bandwidth ( s₁₁ ≤-10 dB) is 6.5% with a center frequency of 5.24GHz. Preliminary theoretical results on impedance bandwidths and radiation patterns for the different states of the reconfigurable antenna are described.

Identifiers

book ISSN :	1522-3965
book ISBN :	978-1-4244-4967-5
book e-ISBN :	978-1-4244-4968-2
DOI	10.1109/APS.2010.5561803

Authors

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Qin, P.Y.

CSIRO ICT Centre, Epping, NSW, Australia

Weily, A.R.

CSIRO ICT Centre, Epping, NSW, Australia

Guo, Y.J.

CSIRO ICT Centre, Epping, NSW, Australia

Liang, C.H.

Nat. Key Lab. of Antenna & Microwave Technol., Xidian Univ., Xi'an, China

Keywords

slot antennasantenna radiation patternsmicrostrip antennasfrequency 5.24 GHzpattern reconfigurable U-slot antennamicrowave substratepatch antennaPIN photodiodesMicrowave antennasResonant frequencyPatch antennas

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Frequency Reconfigurable Split Ring Antenna for LTE And WiMAX Applications

Madhav BTP, Prudhvi Nadh, Anil Kumar, Pardhasaradhi P, Rao M C, Lakshman P

Abstract

This paper presents frequency reconfigurable dual band antenna for WiMAX and LTE 2500 band applications using four PIN diode switches. The antenna is compact in size with dimensions of 30 x 30 x 0.8 mm3 and designed on FR-4 dielectric substrate with a partial ground plane. The fabricated antenna operates in the frequency range of LTE and WiMAX (2.5-2.69 GHz and 3.4-3.6 GHz) respectively. The frequencies can be controlled by using PIN diodes and antenna attained the gain ranging of 3.34-4.46 dBi. This designed antenna resonating at 2.52 and 3.49 GHz when the PIN diodes are in ON state and resonating at 2.68 and 3.58 GHz when PIN diodes are in OFF state. The proposed antenna has bidirectional radiation at upper frequency bands and unidirectional at lower frequency bands. The proposed split ring structured antenna has the radiation efficiency of 94.12% at 2.52 GHz and 90.34% at 3.49 GHz in ON state. Antenna providing good agreement between the measured (Antenna measurement setup with VNA) and simulated results (Ansys-HFSS).

References

Design Of Frequency- And Pattern-reconfigurable Wideband Slot Antenna

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Frequency And Pattern Reconfigurable Slot Antenna

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