Bluetooth/Uwb Dual-Band Planar Diversity Antenna With Wimax and Wlan Band-Notch Characteristics

Abstract

Abstract-In this paper, a stage wise realization of compact Bluetooth -UWB dual-band diversity antenna with WiMAX and WLAN band-notch characteristics is presented.The proposed structure consists of two co-planar semicircular dual band-notch monopole antennas, mounted with planar spiral. Individual antenna configuration provides an impedance bandwidth (VSWR < 2) for dualband i.e., both Bluetooth and UWB bands. For dual band-notch characteristic, two sets of spirals are capacitively coupled with the feed line of antenna. This configuration provides band-notch (VSWR < 2) for WiMAX i.e., (3.3-3.6 GHz) and WLAN (5.13-5.85 GHz) bands. For enhancing reception capabilities of the proposed structure, twin coplanar antennas are used to fulfill diversity requirements. However, due to coplanar and close proximity to each other, there is high possibility of mutual coupling between coplanar antenna elements. To address the mutual coupling between elements, cross-strip variablesized frequency selective structures are used. Antenna diversity of the proposed structure is validated by measuring radiation pattern characteristic and envelop co-relation factor (ECC). A good agreement between measured and simulated responses ensures that the proposed diversity antenna can be used for interference free Bluetooth/UWB dual-band applications.

Integrated GSM and UWB fractal monopole antenna with triple notches

“…The majority of these antennas have single notches and dual notches characteristics in the UWB band. Some integrated UWB band antenna with a single notch is designed using spanner shape , while the dual notches are created by a planar spiral mounted with a set of capacitive coupled spiral on semicircular monopole, and a quarter‐wavelength stub attached to the ground plane near the feed line . Triple notches in such integrated antennas are difficult to design.…”

“…Nowadays microwave communities are working on the design and development of integrated narrow band and Ultra Wide Band (UWB) antennas with notches . GSM (900 MHz) is used for mobile communication and Ultra Wideband Technology (UWB) frequency range 3.1–10.6 GHz is used for short range wireless communication system.…”

“…GSM (900 MHz) is used for mobile communication and Ultra Wideband Technology (UWB) frequency range 3.1–10.6 GHz is used for short range wireless communication system. UWB technology provides low power consumption, high data transfer rate (110–200 Mb/s), larger bandwidth, simple hardware configuration, and Omnidirectional radiation pattern . Recently some portable notebooks have embedded with three antennas, two of them for the Wireless Local Area Network (WLAN) at two different frequencies and the other one for Bluetooth application.…”

“…Integrated antennas with UWB band are designed using ACS‐fed , microstrip antenna with L‐shape resonator , and fork‐shaped antenna for Bluetooth and UWB applications . Very few works have been done on integrated antennas with multiple notches . The majority of these antennas have single notches and dual notches characteristics in the UWB band.…”

Mimo Antenna for Bluetooth, Wi-Fi, Wi-Max and Uwb Applications

“…Inter-element isolations of 26 dB and 20 dB are achieved in [13,14] respectively, but the antennas are designed over 3.1 GHz-5.15 GHz for a specific applications viz USB dongle and portable devices. The Bluetooth/UWB dual band diversity antenna reported in [15] uses a set of vertical microstrip lines between antenna elements to reduce the mutual coupling.…”