Parasitic arrays can generate steerable patterns using tunable reactive loads at the parasitic elements to provide the required phase for the scattered radiation. However, the radiation that is coupled to the parasitic elements and reflected by the attached loads has a frequency dependent phase delay, leading to a beam/null squint effect and a limited instantaneous squint-free bandwidth. In this paper, we introduce a technique for eliminating this frequency dependence using non-Foster parasitic loads, whose reflection phase has a positive phase dispersion slope that can cancel the negative phase dispersion slope associated with propagation delays. Further, by tuning the non-Foster load, we can tune the total scattered phase to achieve steer...
Harrington [1] proposed a circular array of reactive loaded parasitic elements surrounding a half-wa...
© 2014 Institute of Antenna Engineers of Taiwan. The impedance bandwidth of a metamaterial-inspired,...
Periodic structure has been extensively applied in many applications, such as wireless communication...
Parasitic arrays can generate steerable patterns using tunable reactive loads at the parasitic eleme...
In this paper, a cross-type parasitic array antenna is designed to tune the radiation ...
© 2015 IEEE. The impedance bandwidth of a near-field resonant parasitic (NFRP) element of an electri...
This PhD dissertation explores novel electromagnetic applications using negative-group-delay (NGD) a...
The demand for miniaturized, broadband communication systems has created a need for electrically sma...
A non-Foster circuit (NFC) based on the resonant tunneling diode (RTD) is proposed for application t...
This dissertation presents the design, analysis, and measurement of pattern null reconfigurable ante...
Recently, electronically steerable passive array radiator antennas have been considered for beam-for...
Highly directive antennas with beam steering capabilities are needed to overcome high path-loss, mit...
As a counterintuitive phenomenon, negative group delay (NGD) was first found in regions of strong an...
International audienceIn this paper, an active phase shifter that features a frequency independent t...
Most of the work in phased arrays loaded with non-Foster forms has been made about characteristics t...
Harrington [1] proposed a circular array of reactive loaded parasitic elements surrounding a half-wa...
© 2014 Institute of Antenna Engineers of Taiwan. The impedance bandwidth of a metamaterial-inspired,...
Periodic structure has been extensively applied in many applications, such as wireless communication...
Parasitic arrays can generate steerable patterns using tunable reactive loads at the parasitic eleme...
In this paper, a cross-type parasitic array antenna is designed to tune the radiation ...
© 2015 IEEE. The impedance bandwidth of a near-field resonant parasitic (NFRP) element of an electri...
This PhD dissertation explores novel electromagnetic applications using negative-group-delay (NGD) a...
The demand for miniaturized, broadband communication systems has created a need for electrically sma...
A non-Foster circuit (NFC) based on the resonant tunneling diode (RTD) is proposed for application t...
This dissertation presents the design, analysis, and measurement of pattern null reconfigurable ante...
Recently, electronically steerable passive array radiator antennas have been considered for beam-for...
Highly directive antennas with beam steering capabilities are needed to overcome high path-loss, mit...
As a counterintuitive phenomenon, negative group delay (NGD) was first found in regions of strong an...
International audienceIn this paper, an active phase shifter that features a frequency independent t...
Most of the work in phased arrays loaded with non-Foster forms has been made about characteristics t...
Harrington [1] proposed a circular array of reactive loaded parasitic elements surrounding a half-wa...
© 2014 Institute of Antenna Engineers of Taiwan. The impedance bandwidth of a metamaterial-inspired,...
Periodic structure has been extensively applied in many applications, such as wireless communication...