doi:10.1002/1098-2760(20001120)27:43.0.CO;2-8microstrip antennasgenetic algorithmVSWRbandwidthfeedlinesA. RaychowdhuryDepartment of Electronics and Telecommunication Engineering, Jadavpur University, Calcutta 700 032, IndiaB. GuptaDepartment of Electronics and Telecommunication Engineering, Jadavpur University, ...
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es parameters for an antenna matchedatω0. There?ectioncoe?cientoftheantennaisthen Γ0(ω)= Z0(ω)?Z ch. ch (2) Z (ω)+Z 0 ThematchedVSWRbandwidthforanantennatunedat afrequencyω0isde?nedasthedi?erencebetweenthetwo frequenciesoneithersideofω0 atwhichtheVSWRequals thelinearsuperpositionof...
The lower bound on quality factor (0 is a well known performance limit of electrically small, single TM or TE mode antennas that exhibit a single impedance resonance within their operating bandwidth. Since Q and matched VSWR bandwidth are inversely related, the lower bound on Q implies that ...
The best device had a VSWR of 2:1 over a bandwidth of 5.55GHz centred on 5.15GHz. These new devices exhibit low acoustic attenuation across the optical aperture and also have low optical scatter. They will permit the development of ultrawide band acousto-optic spectrometers.L. W. J. Kent...
A novel feeding mechanism consisting of a printed bow-tie feed placed within the slot aperture and metal baffles between the slot ground plane and a grounded backplane allow this antenna to operate over more than an octave bandwidth (1.15 to 2.46 GHz) with a VSWR>2. Measured radiation ...
Exact and approximate expressions for the quality factor (0 [1] and bandwidth of a general, tuned antenna were previously derived and presented in [2]. An approximate, inverse relationship between Q and matched VSWR bandwidth was presented and was shown to be valid over a wide range of ...
VSWRA leaf-shaped monopole antenna with an extremely wide bandwidth is introduced. The antenna is composed of a leaf-shaped metal sheet with three circular holes vertically mounted on the ground plate covered by a dielectric layer. Its measured -10-dB return-loss frequency range is from 1,3 ...