[PDF] Top 20 Compact UWB Antenna with Tunable Band-Notch Characteristics Using Varactor Diode

... variable notch frequency, we need to change the effective electrical length of the ...a varactor diode (Skyworks SMV1231) with capacitance range from ...WLAN band, the diodes are located near ... See full document

... a UWB Vivaldi antenna with switchable and widely tunable band-notch characteristics is ...Vivaldi antenna proposed by Gibson in 1979 has many features such as good ... See full document

... a compact UWB chip antenna using the coupling concept has been proposed for UWB ...By using the inclined slot on the rectangular radiating patch, the bandwidth of the proposed ... See full document

... changes the inductance and capacitance of the input impedance, which in turn leads to change the bandwidth. The simulation software HFSS is used in the design and simulation processes of the proposed antenna. By ... See full document

... proposed antenna. Detailed dimensions of the proposed antenna are listed in Table ...proposed antenna is manufactured for validating the feasibility of ...fabricated antenna, and a 50 Ω-SMA ... See full document

... 2.3. Band-notched UWB Antenna for Upper WLAN Band The geometry of the proposed band-notched UWB antenna for upper WLAN band is illustrated in Figure ...The ... See full document

... the UWB is achieved by etching different geometrical structures either from the monopole or the ground plane of the proposed wideband antenna ...proposed antenna design, which helps to get the ... See full document

... realise UWB antennas with band-notch characteris- tics ...achieve band-notch characteristic [2, ...multi-band notch characteristics [3, 5, 6]; however, multiple ... See full document

... Abstract—A compact planar monopole UWB antenna with quadruple band-notched characteristics is analyzed and ...quadruple band-notched characteristics are achieved at ... See full document

... of notch antennas, the theory has become more ...achieve band-notched characteristics are grooving [2–4], adding parasitic units [5–8], electromagnetic band gap (EBG) [9, 10], on the radiating ... See full document

... wideband antenna has the potential to be interfered by the existing wireless communication systems such as WIMAX, WLAN and C-band satellite communication ...introducing band notch or ... See full document

... this antenna is less than − 15 dB in full UWB, and it is lower than −20 dB in most UWB frequency spectrum which is from ...proposed antenna produces quasi-omnidirectional patterns in the Y Z ... See full document

... weight, compact and easy to fabricate ...other antenna structures in modern communication ...of UWB which had been approved by FCC, the interest of UWB systems has aroused among many due to it ... See full document

... numerous antenna designs designed by the researchers all over the world that can qualify to achieve UWB bandwidth ...on UWB but its Omni-directional restrictions make them not suitable for portable ... See full document

... systems, UWB systems operate over a much larger ...the UWB systems, the antennas with ultra- wide bandwidth have been widely investigated by both academia and ...the UWB system, there are existing ... See full document

... a compact MIMO antenna with band-notch characteristic at WLAN band is proposed for portable wireless ultra-wideband ...MIMO antenna consists of two rectangular monopoles which ... See full document

... In the beginning, the flower shape is optimized without any slots or varactors to achieve UWB characteristics. Three ellipses are used to construct the flower shape. The angles between the three ellipses are ... See full document

... the UWB and narrowband systems, such as WiMAX and WLAN, a compact UWB antenna with enhanced dual frequency notch characteristics is proposed and ...four notch filters ... See full document

... Abstract—A compact reconfigurable antenna integrated with stepped impedance stub (SIS) loaded stepped impedance resonator (SIR) and SIS loaded hexagon stepped impedance resonator (HSIR) for ultra wideband ... See full document

... more compact multi-tasking systems in wireless communications necessary for accessing different RF bands on the same ...narrow band operation as well as wide band sensing in cognitive radio ...pattern ... See full document