DESIGN Bela OF A SHAPED BEAM ANTENNA FOR AM-TV BROADCASTING SYSTEM Ladanyi-Tur6czy ABSTRACT In this paper a design antenna is presented, which PTT method of a special shaped beam was constructed for the Hungarian as a part of a microwave AM-TV broadcasting system.A special reflector and a new type of hybrid mode primary feed - "box-horn" - is discussed. 



THE THEORETICAL ANALYSIS OF SHAPED DUAL-REFLECTOR ANTENNA WITH RING FOCUS Tao Wang,* Rirong Zhang,* Hanl i Wang* ABSTRACT Theoretical analysis of shaped dual reflector antenna with r1ng focus has been carried out. The reflectance caused by subreflector and antenna efficiency are computed by means of the field correlation method. We have found the optimum position of feed where subreflector VS

AN AL YSIS OF ROUN D CAV IT Y AWT ENN A, WITH PERFO RATED RADIATION WALL 5 V Sa1/Q;V"', + H D Hristov -------in. with eked ABST: R ACT Using a generalised of perforaited the network moment and was method found radiation .It all representation of of round oped. good aperture cavity The theory problems antenna was the checwith terms a to theory is be in davel numerically agreeme

A SINGLE-LAYERED RADIAL LINE SLOT ANTENNA FOR DBS RECEPTION M. Ando, M. Takahashi, ABSTRACT A radial line slot antenna(RLSA) is a commercial high efficiency planar array. Double-layered lines have contributed to realize uniform aperture illumination and to reduce terminated loss power. This paper newly proposes a single-layered RLSA which is much simpler in structure. Two novel techniques are appl

A NEW LOW PROFILE WAVEGUIDE SLOT ANTENNA FOR 12 GHz SATELLITE TV RECEPTION. S A Kotsopou1os* ABSTRACT An X-band model antenna has been presented for the application of receiving TV signals at 12 GHz The experimental antenna belongs to the family of radial waveguide slot antennas, with radiating elements, cross slots, which are arrayed in sequence along a design four The designed - arm logarithm

DESIGN OF HORN CLUSTERS INCLUDING EDGE EFFECTS AND MUTUAL COUPLING L. de Haro *, J.L. Besada *,B. Galocha * ABSTRACT Computation of immersed patterns including mutual coupling and edge effects is proposed in order to define a new step for the synthesis of multifed antennas. This procedure has been applied to the DBS and AMERICA-GOV antennas of HISPASAT satellite reaching an improvement versu

CYLINDRICAL PHASED ARRAY ANTENNA FOR SSR-MODE S SYSTEM NORIAKI MIYANO,YASUO SUZUKI,IKUO SUZUKI and TANEAKI CHIBA ABSTRACT A cylindrical conformal phased array antenna which is a candidate of SSR(Secondary Surveillance Radar) antenna for next generation is experimentaly constructed and tested. This antenna is consisted of broadband microstrip patch antennas. Band broadening is achieved

STANDING WAVE ARRAY OF EMC TRANSVERSE DIPOLE ARRAYS I.M. FLOC'H*, I. CITERNE*, Abstract Ph. LEPELTIER** Sets of design equations for standing wave arrays with transverse electromagnetically coupled dipoles are presented. They are based 1) on the ELLIOTI-STERN design procedure of arrays greatly alleviated when the mutual coupling between radiating elements is neglected and 2) on computed d

PERFORMANCE VACUUM OF A SPHERICAL TECHNIQUE ARRAY ANTENNA FABRICATED BY FORMING Wataru Chujo, Yoshihiko Konishi, Yukio Ohtaki, and Koji Yasukawa ABSTRACT In this paper, a spherical is discussed. and planar array arrays antenna scanning array are examined applicable to mobile simulation, about satellite and it 2 dB at a communications gain of spherical is shown scan angle performanc