Now showing items 1-20 of 21
Next Page| Abstract: | A novel antenna configuration comprised of two circular microstrip antennas (CMAs) resonating in the TMtt and TM2, modes, producing radiation characteristics suitable for a mobile telephone handset, is presented. The antennas operating at the same frequency are placed back to back with a separation comparable to the thickness of a typical handset. The radiation pattern consists of a region of reduced radiation intensity, which minimizes the radiation hazards to the user |
| Description: | Microwave and Optical Technology Letters,VOL 23,issue 6.pp 370-372 |
| URI: | http://dyuthi.cusat.ac.in/purl/4329 |
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| Microstrip Ante ... uced Radiation Hazards.PDF | (1.152Mb) |
| Abstract: | The paper proposes an octagon shaped Microstrip Patch Antenna suitable for dual band applications. The striking features of this compact, planar antenna are sufficient isolation between the two operating bands and an area reduction of - 29% in comparison to a conventional circular patch antenna operating in the same band |
| Description: | Antennas and Propagation Society International Symposium, 2002. IEEE |
| URI: | http://dyuthi.cusat.ac.in/purl/4328 |
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| Octagon Shaped ... Dual Band Applications.pdf | (161.2Kb) |
| Abstract: | Experimental investigations on Microstrip line excited Dielectric Resonator Antenna configurations suitable for Mobile Communication applications are reported. High permittivity (εrd = 48) resonator samples with different aspect ratios are employed for the study. Theoretical analysis performed using FDTD method is also presented. |
| Description: | XXVIII URSI GA New Delhi |
| URI: | http://dyuthi.cusat.ac.in/purl/4327 |
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| Rectangular Die ... unication Applications.pdf | (440.1Kb) |
| Abstract: | The recent boom in wireless communication industry, especially in the area of cellular telephony and wireless data communication, has led to the increased demand for multi band antennas. In such applications the issues to be addressed are, wide bandwidth and gain, while striving for miniature geometry. A dual frequency configuration useful in GSM1800 and Blue tooth, is one that operates with similar properties, both in terms of reflection and radiation characteristics, in the two bands of interest. Dual frequency operations can be realized by exciting the Microstrip Patch Antenna (MPA) using a single feed [1] or dual feed [2]. In this paper, Conformal FDTD[3] method with Perfect Magnetic Conductor (PMC) applied along the plane of symmetry [4] is used to study the characteristics of an Octagonal MPA. The theoretical results are compared against the experimental and IE3D™ simulated results |
| Description: | Antennas and Propagation Society International Symposium, 2007 IEEE,PP 5259-5262 |
| URI: | http://dyuthi.cusat.ac.in/purl/4335 |
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| Conformal FDTD ... crostrip Patch antenna.pdf | (343.7Kb) |
| Abstract: | In this paper the design issues of compact genetic microstrip antennas for mobile applications has been investigated. The antennas designed using Genetic Algorithms (GA) have an arbitrary shape and occupies less area (compact) compared to the traditionally designed antenna for the same frequency but with poor performance. An attempt has been made to improve the performance of the genetic microstrip antenna by optimizing the ground plane (GP) to have a fish bone like structure. The genetic antenna with the GP optimized is even better compared to the traditional and the genetic antenna. |
| Description: | Antennas and Propagation Society International Symposium, 2008. AP-S 2008. IEEE |
| URI: | http://dyuthi.cusat.ac.in/purl/4346 |
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| Design of a Com ... Antenna with improved.pdf | (395.7Kb) |
| Abstract: | A slot line fed planar dipole antenna with a parasitic strip for wide band applications is presented. The presented antenna offers a 2:1 VSWR bandwidth from 1.66 to 2.71 GHz covering the DCS/ PCS/UMTS and IEEE 802.11b/g bands with a gain better than 6.5 dBi. The uniplanar design, simple feeding, and high gain make it a versatile antenna for wireless applications |
| Description: | MICROWAVE AND OPTICAL TECHNOLOGY LETTERS / Vol. 51, No. 3, March 2009 |
| URI: | http://dyuthi.cusat.ac.in/purl/4321 |
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| Slot Line Fed D ... Wide Band Applications.pdf | (416.4Kb) |
| Abstract: | Negative magnetic permeability media (NMPM) can be built up by using small resonant metallic particles like Split ring resonator (SRR) which has very high magnetic polarisability. A group of these particles shows a negative permeability region near and above the resonant frequency. The continuous medium parameters describing the SRR array can be predicted from their individual electromagnetic behavior near the resonances. The paper presents an optimizing software using Genetic Algorithm (GA) to design an edge coupled two ring SRR for a particular frequency |
| Description: | Recent Advances in Microwave Theory and Applications, 2008. MICROWAVE 2008. International Conference on |
| URI: | http://dyuthi.cusat.ac.in/purl/4345 |
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| Ga Optimized Srr Calculator.pdf | (1.052Mb) |
| Abstract: | A dual band RFID applications in 800 900 MHz and 2400 MHz band is presented. The Asymmetric Coplanar Strip (ACS) fed antenna consists of inverted L shaped monopole with a capacitive loading to provide necessary impedance matching and current distribution. The antenna has wide bandwidth from 790 MHz tol050 MHz and from 2350 MHz to 2640 MHz coving the RFID UHF and Microwave frequencies. The uniplanar antenna having overall dimensions of 48 mm x 14 mm is printed on one side of a substrate of dielectric constant 4.4 and height 1.6 mm. |
| Description: | Recent Advances in Microwave Theory and Applications, 2008. MICROWAVE 2008. International Conference on |
| URI: | http://dyuthi.cusat.ac.in/purl/4334 |
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| Compact Uniplan ... Multiband Applications.pdf | (2.036Mb) |
| Abstract: | This paper presents the design and development of a compact CPW fed quad band antenna. This low profile antenna has a dimension of 32mmx31mm when printed on a substrate of dielectric constant 4.4 and height 1.6mm. The antenna covers GSM 900, DCS 1800, IEEE802.11.a, IEEE802.11.b and HiperLAN2 bands. The antenna exhibits good radiation characteristics with moderate gain |
| Description: | Applied Electromagnetics Conference (AEMC), 2009 |
| URI: | http://dyuthi.cusat.ac.in/purl/4344 |
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| CPW-Fed Quad-Ba ... t Wireless Application.pdf | (2.805Mb) |
| Abstract: | A compact microstrip multiband antenna on a modified ground plane which can operate over the bands starting from 900 MHz to 5.35 GHz which includes the GSM (880-960) GPS (1568-1592 MHz), DCS (1710-1880 MHz), and PCS (1850- 1990 MHz). UMTS (1920-2170 MHz), IEEE 802.11 b/g (2400- 2484) and WLAN IEEE 802.11a band (5.15-5.35) is reported in this paper. The overall dimension of the antenna is 33 x 33 mm2 including the top patch with a dimension 22 x 22 mm2. The experimental results of the antenna are presented in this paper. The results confirm that the antenna exhibits wide band characteristics and covers 7 bands of operation |
| Description: | India Conference (INDICON), 2009 Annual IEEE |
| URI: | http://dyuthi.cusat.ac.in/purl/4324 |
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| Design of a Com ... and Microstrip Antenna.pdf | (161.8Kb) |
| Abstract: | A method for simultaneously enhancing the bandwidth and reducing the size of microstrip antennas (MSAs) using a modified ground plane (GP) has been proposed with design formulas. A combshaped truncated GP is used for this purpose. This method provides an overall compactness up to 85% for proximity-coupled MSAs in the frequency range of 900 MHz–5.5 GHz with an improvement inbandwidth up to seven times when compared with the conventional ones |
| Description: | MICROWAVE AND OPTICAL TECHNOLOGY LETTERS / Vol. 52, No. 12, December 2010 |
| URI: | http://dyuthi.cusat.ac.in/purl/4343 |
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| Design Of Compa ... Modified Ground Plane.pdf | (1.142Mb) |
| Abstract: | A printed compact coplanar waveguide fed triangular slot antenna for ultra wide band (UWB) communication systems is presented. The antenna comprises of a triangular slot loaded ground plane with a T shaped strip radiator to enhance the bandwidth and radiation. This compact antenna has a dimension of 26mm×26mm when printed on a substrate of dielectric constant 4.4 and thickness 1.6mm. Design equations are implemented and validated for different substrates. The pulse distortion is insignificant and is verified by the measured antenna performance with high signal fidelity and virtually steady group delay. The simulation and experiment reveal that the proposed antenna exhibits good impedance match, stable radiation patterns and constant gain and group delay over the entire operating band |
| Description: | Int. J. Electron. Commun. (AEÜ) 66 (2012) 189–194 |
| URI: | http://dyuthi.cusat.ac.in/purl/4325 |
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| A compact CPW f ... wide band applications.pdf | (1.246Mb) |
| Abstract: | A compact coplanar waveguide (CPW)-fed uniplanar antenna with harmonic suppression characteristics is presented. The above characteristics are achieved by properly modifying the ground plane and adjusting the signal strip of an open-ended CPW-fed transmission line. The simulated and experimental characteristics of the antenna are presented, compared, and discussed. |
| Description: | International Journal of RF and Microwave Computer‐Aided Engineering,vol 21,issue 5,pp 543-550 |
| URI: | http://dyuthi.cusat.ac.in/purl/4332 |
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| Compact CPW-Fed ... h Harmonic Suppression.pdf | (2.514Mb) |
| Abstract: | A compact coplanar waveguide (CPW) fed uniplanar antenna for Quad-band applications is presented. The Quad-band operation is realized by imposing various current paths in a modified T-shaped radiating element. The antenna covers GSM 900, DCS 1800, IEEE802.11.a, IEEE802.11.b and HiperLAN-2 bands and exhibits good radiation characteristics. This low profile antenna has a dimension of 32mm×31mmwhen printed on a substrate of dielectric constant 4.4 and height 1.6mm. Details of design with experimental and simulated results are presented |
| Description: | Int. J. Electron. Commun. (AEÜ) 65 (2011) 553–559 |
| URI: | http://dyuthi.cusat.ac.in/purl/4342 |
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| Compact CPW-fed ... wireless applications.pdf | (1.533Mb) |
| Abstract: | Electric permittivity and magnetic permeability control electromagnetic wave propagation th rough materials. I n naturally occu rring materials, these are positive. Artificial materials exhi b iting negative material properties have been reported : they are referred to as metamaterials. This paper concentrates on a ring-type split-ring resonator (SRR) exhibiting negative magnetic permeability. The design and synthesis of the SRR using the genetic-algorithm approach is explained in detail. A user-friendly g raphical user i nterface (G U I ) for an SRR optim izer and estimator using MATLAB TM is also presented |
| Description: | IEEE Antennas and Propagation Magazine, Vol. 53, No. 4, August 20 1 1 |
| URI: | http://dyuthi.cusat.ac.in/purl/4322 |
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| Design of an ... g Split-ring resonator.pdf | (4.797Mb) |
| Abstract: | A compact Co-Planar Waveguide (CPW) fed antenna operating at 2.4GHz with 300MHz 2:1 VSWR bandwidth is presented. Compared to a conventional quarter wavelength CPW fed monopole antenna, the aperture area reduction of the present antenna is 85%. The prototype antenna fabricated on a substrate of εr = 4.4 and thickness 1.6mm is only 22x10x1.6mm3. This much size reduction and impedance matching is achieved by adjusting the signal to ground plane separation and meandering the ground plane of a 50Ω CPW transmission line |
| Description: | General Assembly and Scientific Symposium, 2011 XXXth URSI |
| URI: | http://dyuthi.cusat.ac.in/purl/4326 |
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| Compact Coplana ... d Antenna for Wireless.pdf | (635.5Kb) |
| Abstract: | The paper presents a maximally flat compact planar filter employing folded Stepped Impedance Resonators (SIR) and Complementary Split Ring Resonators (CSRR), for Ultra Wide Band (UWB) applications. An interdigital quarter wavelength coupled line is used for achieving the band pass characteristics. The filter has low insertion loss in its pass band and steep roll off rate and good attenuation in its lower and upper stop bands. The measured microwave characteristics of the fabricated filter show good agreement with the simulated response |
| Description: | Electronic System Design (ISED), 2013 International Symposium on |
| URI: | http://dyuthi.cusat.ac.in/purl/4341 |
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| Folded SIR with ... Wide Band Applications.pdf | (385.5Kb) |
| Abstract: | In this paper, a multiband antenna using a novel fractal design is presented. The antenna structure is formed by inscribing a hexagonal slot within a circle. This base structure is then scaled and arranged within the hexagon along its sides without touching the outer structure. The proposed CPW fed, low profile antenna offers good performance in the 1.65 – 2.59 GHz, 4.16 – 4.52 GHz and 5.54 – 6.42 GHz bands and is suitable for GSM 1800/1900, Bluetooth, IMT advanced systems and upper WLAN applications. The antenna has been fabricated on a substrate of height 1.6 mm and εr = 4.4 and simulation and experimental results are found to be in good agreement |
| Description: | RADIOENGINEERING,vol 22,issue 4,pp 1263 |
| URI: | http://dyuthi.cusat.ac.in/purl/4330 |
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| A Novel Planar ... Multiband Applications.pdf | (3.535Mb) |
| Abstract: | An electrically small, broadband-modified, truncated ground metamaterial EZ antenna is presented. This, a modified EZ antenna system, achieves a larger bandwidth of the order of 650 MHz by adjusting the metamaterial-inspired meandered ground element fed by a top loaded monopole. The design is devoid of the large ground planes and the external parasitic elements used in conventional designs for achieving proper impedance matching characteristics. The antenna requires a small foot print of kg/5 3 kg/10, where kg is the guided wavelength corresponding to the lowest frequency of operation, when printed on a substrate of dielectric constant 4.4 and thickness 1.6 mm. The antenna offers a 2:1 VSWR bandwidth from 750 MHz to 1.4 GHz, which covers CDMA, GSM, and ISM bands |
| Description: | MICROWAVE AND OPTICAL TECHNOLOGY LETTERS / Vol. 56, No. 3, March 2014 |
| URI: | http://dyuthi.cusat.ac.in/purl/4339 |
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| A Planar Compac ... ired Broadband Antenna.pdf | (567.7Kb) |
| Abstract: | A novel compact chipless RFID tag using spurline resonators is discussed in this paper. The detection of the tag's ID is using the spectral signature of a spurline resonator circuit. The tag has a data capacity of 8-bits in the range 2.38 to 4.04 GHz. The tag consists of a spurline multiresonating circuit and two cross polarized antennas. The prototype of the tag is fabricated on a substrate CMET/ LK4.3 of dielectric constant 4.3 and loss tangent 0.0018. The measured results show that group delay response can also be used to decode the tag’s identity |
| Description: | RADIOENGINEERING, VOL. 23, APRIL 2014 |
| URI: | http://dyuthi.cusat.ac.in/purl/4338 |
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| Frequency Coded ... ng Spurline Resonators.pdf | (1.526Mb) |
Now showing items 1-20 of 21
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