Abdul Rashid, Munirah Az Zahra (2023) An ultra-wideband antenna with triple band-notched characteristics for wearable application. Masters thesis, Universiti Tun Hussein Onn Malaysia.

Preview	Text 24p MUNIRAH AZ ZAHRA ABDUL RASHID.pdf Download (461kB) | Preview
	Text (Copyright Declaration) MUNIRAH AZ ZAHRA ABDUL RASHID COPYRIGHT DECLARATION.pdf Restricted to Repository staff only Download (401kB) | Request a copy
	Text (Full Text) MUNIRAH AZ ZAHRA ABDUL RASHID WATERMARK.pdf Restricted to Registered users only Download (34MB) | Request a copy

Abstract

This work presents a compact UWB antenna with triple band-notched at WiMAX (3.2 – 3.7 GHz), C-band (3.7 – 4.2 GHz) and WLAN (5.15 – 5.35 GHz) for wearable applications. The UWB antenna is fabricated on two different flexible substrates which are thin FR-4 and Rogers Duroid RO3003TM. The two substrates are selected so that the performance of the lossy material (thin FR-4) and the low-loss material (RO3003TM) can be compared. In order to reduce the complexity, only two slots are introduced on the radiating patch instead of three slots to reject each narrowband frequency. In this case, one slot rejects a combination of WiMAX and C-band and the other slot rejects the WLAN frequency band. The UWB antenna on the thin FR-4 has an overall size of 21×16 mm2, whereas the UWB antenna on RO3003TM substrate is 19×14 mm2, both of which are very compact and thus, suitable for wearable applications without causing discomfort when worn on body. Although the antennas are small in size, their performance is not compromised. The UWB antenna with the thin FR-4 has the frequency range from 2.51 GHz to 12.09 GHz, maximum radiation efficiency of 100% and maximum gain of 4 dBi. Meanwhile, the UWB antenna with RO3003TM has the frequency range from 2.83 GHz to 10.78 GHz, maximum radiation efficiency of 80% and maximum gain of 4 dBi. Nevertheless, both antennas are able to reject the WiMAX and C-band as well as the WLAN band. The simulated Specific Absorption Rate (SAR) results show that both antennas comply with the SAR limit Federal Communication Commission (FCC) and International Commission of Non-Ionizing Radiation Protections (ICNIRP) standards for 1 mW input power. Bending investigations performed on different diameters of Styrofoam cylinders shows that the frequency range and the notch bands are not very much affected. Therefore, it is safe to conclude that the triple band notched UWB antennas in this work are suitable to be used for wearable applications

Actions (login required)

View Item