[天线]7 Closed-form expressions of the axial step and impulse responses of a parabolic reflector antenna

Closed-form expressions of the axial step and impulse responses of a parabolic reflector antenna qT`k*i?  
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 55, NO. 4, APRIL 2007 .2v_H5<  
Closed-Form Expressions of the Axial Step and *U]V@;XF  
Impulse Responses of a Parabolic Reflector Antenna 9&_<f}ou  
Rodrigo de Oliveira and Marc Hélier !,Va(E|=  
Abstract—Electromagnetic pulses radiated by parabolic antennas Z`KC%!8K  
and similar structures are needed in many applications ZRg;/sX]  
like air and ground penetrating radar or high power microwaves 3 %|86:*  
(HPM) weapons. In this paper, an approach based on Skulkin and 3~S8!nx  
Turchin’s work and on physical optics approximation in the time :QB<?HaS'  
domain is developed to determine the radiated fields. Closed-form }DK7'K  
time-domain expressions of the electromagnetic step and impulse Vc2A  
responses, along the axis of a classical parabolic reflector antenna, =W BTm  
are derived. A closed-form expression of the impulse response 49dd5ddr  
duration is also given. The obtained E-field and H-field formula :]^P1sH[  
are valid along the axis, both near and far from the reflector. Using C86J IC"  
these closed-form expressions, the radiated fields are computed by LS88.w\=S@  
means of a convolution product of the primary source excitation sU@nc!&Y@  
and the impulse response. Numerical results have been obtained @++.F
Ef  
in the case of a causal sine and a generalized Gaussian impulse Qg[/%$x.  
excitations to illustrate some specifi .. pnbIiyV  
79xx2  

未注册仅能浏览部分内容，查看全部内容及附件请先 登录 或 注册