A Compact UWB Antenna with Independently Controllable Notch Bands

Abstract

A minimally-sized, triple-notched band ultra-wideband (UWB) antenna, useful for many applications, is designed, analyzed, and experimentally validated in this paper. A modified maple leaf-shaped main radiating element with partial ground is used in the proposed design. An E-shaped resonator, meandered slot, and U-shaped slot are implemented in the proposed design to block the co-existing bands. The E-shaped resonator stops frequencies ranging from 1.8–2.3 GHz (Advanced Wireless System (AWS1–AWS2) band), while the meandered slot blocks frequencies from 3.2–3.8 GHz (WiMAX band). The co-existing band ranging from 5.6–6.1 GHz (IEEE 802.11/HIPERLANband) is blocked by utilizing the U-shaped section in the feeding network. The notched bands can be independently controlled over a wide range of frequencies using specific parameters. The proposed antenna is suitable for many applications because of its flat gain, good radiation characteristics at both principal planes, uniform group delay, and non-varying transfer function ( S 21 ) for the entire UWB frequency range.

Design of Quad-Port Ultra-Wideband Multiple-Input-Multiple-Output Antenna with Wide Axial-Ratio Bandwidth

“…Numerous types of band elimination antennas have been reported to reject frequently used applications like WLAN, Wi-MAX, Bluetooth, etc. [12,13]. Additionally, spatial diversity schemes are used with UWB structures to improve the system's performance.…”

Design and Modeling of a Semi Circular-Shaped Double Band-Notched UWB Antenna

“…So, it is required to design UWB antennas that are able to notch the above bands to avoid electromagnetic interferences with the UWB systems [1]. Different techniques have been employed for the design of UWB antennas to obtain single, double, and triple band-notching functions [2][3][4][5][6][7][8][9][10][11][12][13]. The notching at a certain frequency was achieved by inserting a slot in the shape of the letter U [2][3][4][5].…”

Stub loaded, low profile UWB antenna with independently controllable notch‐bands

“…Having the liability of narrow notch bands, these antennas still did not provide any solution for controlling notch bands independently. An antenna with independently controllable notch bands is presented in Reference . Researchers achieve three notch bands by using slots and adding additional resonator at the bottom of the antenna, but this antenna still faces the disadvantage of narrow notch bands.…”

“…6,[9][10][11][12][13][14][15][16][17][18] Unwanted band spectrums were firstly notched from the UWB antenna using band stop filters, 9 but they also introduce the drawback of complex circuitry and mismatching of load. 10 To overcome these problems, researchers have adopted various techniques including slotted patches, [11][12][13][14]19 stubs 15,16 metamaterials 17,18 and defected ground structures (DGS) 12 to mitigate desired bands from UWB region. In Reference 11, a compact size UWB antenna is presented, where the bandwidth of a conventional rectangular patch is enhanced by truncating its lower edges.…”