52, Agnes Drive, Framingham, MA 01701
Highlights of Antenna Design
Experience
1998-present MultiBeam Phased Arrays – Offset Reflector
fed by a scanning array (1. stripline notches, 2. stripline Yagis), Notch
array, Pillbox Array, all 30% bandwidth, -30 dB sidelobes across the band.
1996-1998 Wide-band Microstrip antennas for Wireless Communications – PCS,PCN,
WLL,GSM, AMPS, ISM. Microstrip elements of 6dB gain to Microstrip arrays of 20
dB gain.
1995 Dual Band microstrip patch A patch
with a slot on. The lower band radiator is the patch, the higher band radiator
is the slot.
1995 Highly efficient microstrip arrays.
Microstrip arrays on sheet metal. Application: wireless LAN. Frequency
2.4-2.485 GHz
1995 Annular Slot Antenna. Radial
slot in a circular cavity. Omnidirectionality of ±2dB. L-band (30% bandwidth);
application: IFF
1994 Slotted Array Design Code. An array
of two traveling wave sub-arrays, X-band, 20 dB SLL, 32.0 dB gain, no beam
scan.
1994 Microstrip Array fed by an asymmetric stripline
feeding network. CX<-30 dB in within the -3dB beam.
1994 Cosec 2 microstrip.
Non-planar microstrip array. No beam scan.
1994 Asymmetric stripline coupler 2 microstrip-to-stripline
-to-microstrip multilayer coupler
1994 Slot fed helix. Helix fed by a microstrip
network. 12-18 GHz, AX<3dB.
1994 Dual Band Feed. Coaxial, Circularly
polarized P-band and L-band. Return Loss <-18 dB. AX<1.5 dB
1994 Dual Band Feed. Coaxial, Linearly
polarized. C-band and Ku-band. Return Loss<-15 dB. C-band :43 dB gain.
Ku-band: 48 dB gain.
1994 Monoscan Dual-Band Feed (including
down-converter). Circularly polarized feed + four helices. L-band and S-band.
VSWR<1.7:1. AX<2 dB (S-band); <3dB (L-band).
1993 Broadband Polyrod. Dielectric Rod Antenna, 8
to 18 GHz, VSWR<2:1.
1993 Broadband Microstrip Stacked patches. X-band.
1993 Waveguide-to-microstrip transition for
low-loss feeding networks.
1993 Offset Tracker. Offset Front-fed Reflector,
X-band, fed by a cluster of 4 polyrods.
1993 Tracker. Front-fed Reflector, C-band, fed
by a cluster of 4 polyrods.
1992 Antenna for Satellite Ground Station. Disc-on-Cone,
Low-VHF, 18 ft aperture
1992 Aperture fed Microstrip 4´ ´ 4 Array, C-band
4 layers antenna
1992 Stripline-to-microstrip top coupler. Developed
code and validated through measurements for multilayer printed antennas.
1992 Microstrip Array. Design, fabrication and
measurements Ka-band corporate fed Microstrip antenna.
1992 Rotman Lens. Design and analysis.
1992 Cassegrain Antenna Feed. Design and
analysis.
1992 Stripline fed microstrip patch. Developed
code and validated through measurements for multilayer printed antennas.
1992 Perpendicular-fed patch. Developed
code and validated through measurements for multilayer printed antennas.
1991 Microstrip-to-microstrip top coupler. Developed
code and validated through measurements, for multilayer printed antennas.
1991 Aperture coupled patch. Developed
code and validated through measurements for multilayer printed antennas.
1990 Ph.D. theoretical work.
1989 Ph.D. theoretical work.
1989 Cosec 2 reflector. Developed code and
validated through measurements X-band.
1989 Conical scan antenna. Cassegrain
with rotating subreflector W-band, fed by a corrugated horn (94 GHz).
1988 Developed software for antenna design and
scattering using different numericaltechniques (physical optics, geome trical
optics, GTD and UTD:
-
Scattering from finite plates with apertures
-
Dielectric transmission lines
-
Broadband horns
-
3D cosec 2 synthesis
1988 Near-field measurements. Planar and
cylindrical.
1988 Microstrip antenna linear array Ka-band
(35 GHz).
1988 Communication antenna UHF microstrip patch. Low
profile microstrip patch (0.1 l)
1988 Developed software for microstrip antenna
design:
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Patch characterization
-
Finite Arrays
-
Corporate feeding networks
1987 Developed software for antenna design and scattering. Scattering
form a subreflector in a Cassegrain antenna using GTD.
1986 Communication Antenna Cassegrain Reflector, W-band
(94 GHz).
1985 Communication Antenna Cassegrain fed by a septum
horn X-band.
1984 Various Horn Antennas: pyramidal,
corrugated, septum, X-band, Ku-band, W-band.
1983 Software development for
antenna design.
1982 Software development for
antenna design.