Ref.εrS11 (dB)/VSWR at Freq. Band (GHz). FBW %Gain (dBi)Total Efficiency %Enhancement techniques/difficulty levelAntenna/FilteringVolume λ0 × λ0 × λ0 Ant.13.55< −13, at 5.48–7.73, 34.076.3760.85–96.9———VTSA/TTL HPBF0.78 × 0.53 × 0.0149 Ant.2 Empt...
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...
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, ...
The array structure exhibits impedance bandwidth of 1.8 GHz and fractional bandwidth of 15.2%, from 11 GHz to 12.8 GHz frequency range with return loss of (cid:0) 29 : 6 dB and high gain of 14.7 dB. The series fed con(cid:12)guration results in a VSWR of 1.38 and considerably low ...
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 ...
Measured results show that the designed low profile antenna has an impedance bandwidth over 9% for ${rm VSWR}< 2$, with a satisfactory radiation performance within the bandwidth. The proposed method is also applicable to the design of other types of low profile slot-loaded patch antennas.Chen...
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 ...