Dual Band-Reject UWB Antenna With Sharp Rejection of Narrow and Closely-Spaced Bands

A Generalized Concept for Band Notch Generation in Ultra-Wide Band Antennas

“…Another pair of radiating parasitic elements has been attached to the ground plane to radiate in such a way that cancels the radiation of the original UWB antenna at the WLAN band (5.15-5.825 GHz). Analyses show that these proposed parasitic elements are more general than those proposed in [6][7][8][9][10][11][12] since the proposed parasitic elements have predictable positions, and these predictions can be generalized for all wide slot antennas. Moreover, their simple structure does not complicate the antenna analysis significantly.…”

“…In recent years, researchers have used parasitic patches to generate band notches [6][7][8][9][10][11][12], instead of engraving slots, because the slots have more parameters such as the slot position and the slot width that need to be optimized than the parasitic patches which are less sensitive to these parameters. A parasitic arc-shaped strip opposite to the patch of a quasi-self-complementary monopole antenna has been used to protect the antenna from interference from Wireless Local Area Network (WLAN) [6], while an open loop resonator located on the back of a monopole antenna substrate has been used to reduce the WLAN interference [7].…”

“…A parasitic arc-shaped strip opposite to the patch of a quasi-self-complementary monopole antenna has been used to protect the antenna from interference from Wireless Local Area Network (WLAN) [6], while an open loop resonator located on the back of a monopole antenna substrate has been used to reduce the WLAN interference [7]. Two sharp band notches produced by attaching two pairs of parasitic radiators to the radiating patch of a monopole antenna was also considered [8], while U-shaped stub and inverted T-shaped stub have been engraved on the trapezoidal patch on a monopole antenna to remove the WiMax and WLAN interference [9]. In addition, a miniaturized UWB Antenna has been attached with step impedance resonator to generate band notch at the WLAN applications [10] and WiMax and WLAN interference has been canceled by adding Tri-Arm resonator to a rectangular monopole antenna [11].…”

A Novel Reconfigurable Uwb Filtering-Antenna With Dual Sharp Band Notches Using Double Split Ring Resonators

“…The parallel capacitance, inductance, and resistance are calculated by using the following equations [33,34]:…”

A Novel Frequency Reconfigurable Monopole Antenna With Switchable Characteristics Between Band-Notched Uwb and Wlan Applications

“…However, other narrowband systems, such as Wi-MAX (3.4-3.69 GHz), IEEE 802.11a WLAN (5.15-5.35 GHz, 5.725-5.825 GHz) and HIPERLAN (5.45-5.725 GHz), generally affect the UWB system in terms of signal interference. In order to overcome the problems related to signal interference, band-notched UWB antennas are required and hence, are frequently used due to their ability to utilize the complete spectrum in the absence of interfering signals in its close proximity [2].…”