Summary
International Symposium on Antennas and Propagation
2009
Session Number:2B1
Session:
Number:2B1-1
A Compact Slotted Bowtie Patch Antenna
Mohammad Mahdi Shafiei, Mardeni Roslee,
pp.349-352
Publication Date:2009/10/21
Online ISSN:2188-5079
Summary:
Communication systems are growing up to achieve smaller sizes with better performances. Compact circuits have improved by advances in microelectronics, but providing integrated and compact antenna is one of the most important fields of antenna study. In new antenna design, smaller antenna with wider bandwidth is the objective to achieve. Microstrip antennas have good characteristics to compact an antenna. They are lightweight, small volume and low profile. They can be made integrated with MICs with low cost and also they allow for dual- or triple frequency operations. Beside these advantages they also have some drawbacks; they have narrow bandwidth and lower gain [2-3]. Antenna size depends on the desired resonance frequency [1]. In all Microstrip antenna designs, there is a compromising challenge between the size of the antenna and its bandwidth; therefore, antenna researchers have attempt to present small area microstrip antenna with larger bandwidth [4-6]. Different techniques have been used to reduce the size of the microstrip antenna, such as using substrate with larger permittivity [2, 6], imposing a shorting plate or a shorting pin [7] and embedding proper slots in the patch [8-9]. With a size reduction at a fixed operating frequency, the bandwidth of a microstrip antenna is decreased. There are some techniques to improve the bandwidth of the microstrip antenna, for instance, using different resonator [10], impedance matching [11] and applying slots to the geometry [6]. Slots based on their location and geometry have different effects on the antenna bandwidth. This work presents a probe-feed compact slotted bowtie patch antenna operating at the resonance frequency of 2.1GHz. It has significant reduction in size and achieved to larger bandwidth, in comparison to a rectangular patch presented in [3] and a bowtie patch proposed in [1]. Simulation results prove the design.