uwb butterfly shaped monopole antenna

... 141 Planar Monopole UWB Antennas with Cuts at the Edges and Parasitic Loops Karlo Costa and Victor Dmitriev Chapter Characteristics of an Ultra-Wideband (UWB) Butterfly- Shaped Monopole Antenna 155 ... the antennas were optimized with cut-and try method Chapter presents butterfly- shaped monopole antenna that has demonstrated good impedance and radiation performance across the UWB band Monopole ... rectangular and diamond shaped sleeve UWB antennas are presented for UWB performance The analysis of sleeve UWB antenna is also be explained on the basis of transmission line model of antenna and characteristic...

Ngày tải lên: 29/06/2014, 13:20

... trở thành tương tự Planar Monopole Antenna, thể Hình 2.1(c) Hình 2.1: (a) MSA treo không khí, (b) Sửa đổi nguồn cấp liệu MSA, (c) Planar Monopole Antenna Planar Monopole Antennas có BW lớn, giải ... Planar Monopole Antennas thường bao gồm đầu trục kim loại dọc mỏng gắn mặt phẳng nối đất, có BW tăng lên với gia tăng đường kính Một Planar Monopole Antennas tương đương với Monopole Antennas ... Planar Monopole Antennas Trong trường hợp này, tần số fL tính gần tương ứng với VSWR = xác định cách phương pháp phần 2.2.2 Tính toán tần số thấp Planar Monopole Antennas: Đối với Planar Monopole Antennas,...

Ngày tải lên: 21/08/2015, 16:38

... patch antenna array schemes is show The recent progress in the development of UWB planar antenna technology has been reviewed and some types of UWB metal-plate monopole antennas, UWB printed monopole ... and state-of-the-art antenna design in the UWB system For example, design methods of the conventional UWB antennas such as log-periodic dipole array are overviewed and the UWB antennas which are ... planar UWB antennas In section 2, a novel antenna layout will be presented, as the result of subsequent modifications of a native Microwave and Millimeter Wave Technologies: Modern UWB antennas...

Ngày tải lên: 21/06/2014, 11:20

... bowtie antenna The later developed the UWB dipole antenna from the cone antenna Except that, the folded bowtie antenna in Fig 9, also called sectorial loop antennas (SLA) is suitable for UWB antenna ... Technologies: Modern UWB antennas and equipment Fig 14 The CPW-fed monopole UWB antennas (a) (b) (c) Fig 15 The UWB slot antennas using microstrip feeding line (d) The optimized antenna has wide ... Ultra-Wideband Antenna 33 (a) (b) (c) Fig 13 The microstrip fed monopole antennas with circular and elliptical patch Instead of microstrip fed monopole antennas, there are many patch shapes for UWB antenna...

Ngày tải lên: 21/06/2014, 11:20

... antenna[ 5] Fig Monopole antenna with short post[12] Fig Monopole antenna with double feeds [13] UWB printed monopole antennas The UWB printed monopole antenna consists of a monopole patch and a ... structure of metal-plate monopole, such as discs or elliptical monopole antenna [7], trapezium monopole antenna[ 8], inverted cone monopole and leaf -shaped planar plate monopole antennas etc, as shown ... the development of UWB planar antenna technology has been reviewed Some types of UWB metal-plate monopole antennas, UWB printed monopole antennas and UWB printed slot antennas are presented The...

Ngày tải lên: 21/06/2014, 11:20

... and Millimeter Wave Technologies: Modern UWB antennas and equipment [44]K.-H Kim, Y.-J Cho, S.-H Hwang and S.-O Park Band-notched UWB planar monopole antenna with two parasitic patches [J] Electron ... introduced The challenges that affect the design of a custom CW/pulsed UWB 84 Microwave and Millimeter Wave Technologies: Modern UWB antennas and equipment architecture is discussed, also design and ... Slot Antennas 109 x Novel Polarization-Agile Annular Waveguide Slot Antennas Siamak Ebadi and Keyvan Forooraghi Microwave Lab., Tarbiat Modares University Tehran, Iran Introduction Slot array antennas...

Ngày tải lên: 21/06/2014, 11:20

... Millimeter Wave Technologies: Modern UWB antennas and equipment (c) Antenna Tolerance Restrictions Antenna tolerance, having great influence on reflector antenna performance, is also considered ... Millimeter Wave Technologies: Modern UWB antennas and equipment several feed antennas are used, each antenna covering a half octave frequency band The different feed antennas are automatically positioned ... Technologies: Modern UWB antennas and equipment Wichmann, B (1963) A note on restricted difference bases J London Math Soc., Vol.38, pp 465–466 Antenna Measurement 193 10 x Antenna Measurement...

Ngày tải lên: 21/06/2014, 11:20

... Array antenna Fig 13 Array antenna diagnosis: measurement configuration Antennas coupling The coupling coefficient between two antennas can be obtained by using the fields radiated by these two antennas ... far-field measurements use a source antenna The dimensions of this source antenna are limited by the distance between this antenna and the tested antenna A large source antenna increases the measurement ... mismatch between antenna and receiver;  antenna factor frequency interpolation;  antenna factor height deviations;  directivity difference of antenna ;  phase centre location of antenna;  cross-polarisation...

Ngày tải lên: 21/06/2014, 11:20

... Millimeter Wave Technologies: Modern UWB antennas and equipment will be amplified and radiated into the air via an antenna In uplink, the 38-GHz signal from the antenna is amplified by a low noise ... spacing, IRE Transactions on Antennas and Propagation, Vol 9, No 2, (Mar 1961) 187-192, ISSN 0096-1973 242 Microwave and Millimeter Wave Technologies: Modern UWB antennas and equipment R Haupt ... behaviour would be the symmetric one 236 Microwave and Millimeter Wave Technologies: Modern UWB antennas and equipment -11 C=1 C=0.75 C=0.5 C=0.25 SLL1 (dB) -11.5 -12 -12.5 -13 -13.5 10 20 30...

Ngày tải lên: 21/06/2014, 11:20

... be compensated for by the use of antennas with stronger pattern directivity while maintaining small antenna dimensions When such antennas are used, however, antenna obstruction (e.g., by a human ... cos(  s )  jc ] Fn  (19) (20) (21) 264 Microwave and Millimeter Wave Technologies: Modern UWB antennas and equipment The fiber transfer characteristic can be written in the form k2 (  c ... DD-MZM The result is drawn in Figure 18, 266 Microwave and Millimeter Wave Technologies: Modern UWB antennas and equipment together with the result of double side-modes IM (without carrier depression)...

Ngày tải lên: 21/06/2014, 11:20

... in 0.13-um CMOS for UWB impulse radio IEEE Microwave Theory and Techniques, vol 57, no 5, (May 2009), pp 1074-1082 344 Microwave and Millimeter Wave Technologies: Modern UWB antennas and equipment ... isolation between two output ports 17 324 Microwave and Millimeter Wave Technologies: Modern UWB antennas and equipment The calculated results are shown in Figs 13 and 14 If the criterion of ... dielectric rods illustrated in Fig 17 326 Microwave and Millimeter Wave Technologies: Modern UWB antennas and equipment S33 |S| [dB] -10 S11 -20 -30 -40 S11(=S22) 10 12 Frequency [GHz] 14 16...

Ngày tải lên: 21/06/2014, 11:20

... 382 Microwave and Millimeter Wave Technologies: Modern UWB antennas and equipment Previous equations show that the multi-port circuit, together with four ... A clock recovery circuit generates an 384 Microwave and Millimeter Wave Technologies: Modern UWB antennas and equipment in-phase clock at the symbol rate using one of the outputs The use of two ... echo signals 1 and 2 respectively: 386 Microwave and Millimeter Wave Technologies: Modern UWB antennas and equipment d c 1    01  02 (47) A radar sensor prototype (see Fig 32) operating...

Ngày tải lên: 21/06/2014, 11:20

... 412 Microwave and Millimeter Wave Technologies: Modern UWB antennas and equipment The proposed method has been also applied to predict the out-of-band response ... Microwave Theory Tech., 41(6/7), 1195-1206 414 Microwave and Millimeter Wave Technologies: Modern UWB antennas and equipment Guglielmi, M., and G Gheri (1994), Rigorous multimode network representation ... transconductance and Rds: drainsource resistor 416 Microwave and Millimeter Wave Technologies: Modern UWB antennas and equipment This NGD active cell is composed of a field effect transistor (FET) terminated...

Ngày tải lên: 21/06/2014, 11:20

... 472 Microwave and Millimeter Wave Technologies: Modern UWB antennas and equipment RF Pulse Jitter r PRF Supply Voltag ge Current consu umption, max @ 28 ... indicated value should be ensured during the 474 Microwave and Millimeter Wave Technologies: Modern UWB antennas and equipment int terval of data acc cumulation for Fo ourier processing As usual the ... across magnetron and RF envelope n e 476 Microwave and Millimeter Wave Technologies: Modern UWB antennas and equipment No when the ess ow, sential requireme ents to the modu ulator circuits...

Ngày tải lên: 21/06/2014, 11:20

... WIDE BAND (UWB) 1.1 Giới thiệu 1.2 Đặc điểm UWB: 1.3 Các tiêu chuẩn UWB 12 1.3.1 Tiêu chuẩn UWB USA (FCC) 12 1.3.2 Tiêu chuẩn UWB Châu Âu ... Ứng dụng kỹ thuật UWB 14 1.5 Anten ứng dụng UWB radar: 16 1.5.1 Yêu cầu cần có Anten dùng cho UWB radar 16 1.5.2 Một số loại Anten ứng dụng cho UWB Radar ... truyền 1.3 Các tiêu chuẩn UWB 1.3.1 Tiêu chuẩn UWB USA (FCC) Định nghĩa đưa để xác định tín hiệu UWB băng thông tín hiệu phải 0.25 Công thức Taylor băng thông tín hiệu UWB xác định sau: BW = fH...

Ngày tải lên: 22/06/2014, 14:47

... via a single antenna array at the BS, and received by a single antenna at the mobile station The phase shifts introduced to the BS antenna array elements are designated to control the antenna pattern ... in the antenna array HPBW That is [4] TS · dφ = κ · HPBW, dt < κ < 1, d0 (4) where φ is the azimuth angle, dφ/dt is the rate of antenna pattern movement, and TS · (dφ/dt) is the amount of antenna ... to the difference in distance between antenna array elements and the mobile (assuming the smart antenna array is mounted horizontally) Moreover, in (11), the antenna array also 1380 EURASIP Journal...

Ngày tải lên: 23/06/2014, 01:20

... patch antenna array schemes is show The recent progress in the development of UWB planar antenna technology has been reviewed and some types of UWB metal-plate monopole antennas, UWB printed monopole ... bowtie antenna The later developed the UWB dipole antenna from the cone antenna Except that, the folded bowtie antenna in Fig 9, also called sectorial loop antennas (SLA) is suitable for UWB antenna ... Technologies: Modern UWB antennas and equipment Fig 14 The CPW-fed monopole UWB antennas (a) (b) (c) Fig 15 The UWB slot antennas using microstrip feeding line (d) The optimized antenna has wide...

Ngày tải lên: 27/06/2014, 01:21

... K P Ray, “Wide-band planar monopole antennas,” IEEE Trans Antennas Propag., vol 46, no 2, pp 294–295, Feb 1998 [4] Z N Chen, “Broadband rolled monopole, ” IEEE Trans Antennas Propag., vol 51, no ... broadband monopoles,” Proc IEE Microw Antennas Propag., vol 150, no 6, pp 429–435, Dec 2003 [6] X Qing, Z N Chen, and M Y W Chia, UWB characteristics of disc cone antenna, ” in Proc Int Workshop on Antenna ... E -shaped patch antennas for wireless communications,” IEEE Trans Antennas Propag., vol 49, no 7, pp 1094–1100, Jul 2001 [10] T Huynh and K F Lee, “Single-layer single patch wideband microwave antenna, ”...

Ngày tải lên: 10/07/2014, 01:20

... on Antennas and Prop Vol 51.N°8 August 2003 Pp 1690-1705 [3] M Barnes "Ultra-Wideband Magnetic Antenna" US Patent 6091374 July 2000 [4] H.G Schantz, M Barnes "The COTAB -UWB magnetic slot antenna" ... Downloaded on January 14, 2010 at 03:11 from IEEE Xpl Conclusions and Future Work The UWB magnetic slot antenna can be designed in order to meet challenging specifications over a very wide frequency ... measurement is comparable to the simulation result Therefore, if we feed the antenna with a suitable matching network the antenna would be well matched over the entire desired frequency band Measured...

Ngày tải lên: 10/07/2014, 01:20

... interests are in microstrip antennas, ultrawide bandwidth antennas, reconfigurable antennas, feeds for reflector antennas, waveguide horns and polarizers, phased array antennas, wire antennas, and RF MEMS ... directionality This antenna can be further improved to achieve better antenna performance characteristics by implementing a reconfigurable spacing “d” Thus, a directive antenna within the UWB range can ... VERIFICATION OF THE ANTENNA The antenna was verified using the HFSS simulation for the UWB communications using the technique outlined in [19], [20], where a transmit/receive antenna combination...

Ngày tải lên: 10/07/2014, 01:20