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
The paper presents a compact planar Ultra Wide Band ¯lter employing folded stepped
impedance resonators with series capacitors and dumb bell shaped defected ground structures. An
interdigital quarter wavelength coupled line is used for achieving the band pass characteristics. The
transmission zeros are produced by stepped impedance resonators. The ¯lter has steep roll o® rate and
good attenuation in its lower and upper stop bands, contributed by the series capacitor and defected
ground structures respectively.
Description:
Progress In Electromagnetics Research C, Vol. 49, 123{131, 2014
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
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
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
Mridula, S; Anila, P V; Indhu, K K; Nijas, C M; Sujith, R; Mohanan, P(Wiley Subscription Services, Inc., A Wiley Company, March 1, 2014)
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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
Mridula, S; Binu, Paul; Mohanan, P; Bijumon, P V; Sebastian,M T(URSI, October , 2005)
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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.
Mridula, S; Deepu, V; Sujith, R; Mohanan, P(Wiley Subscription Services, Inc., A Wiley Company, July 18, 2008)
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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