Our antenna designs are based on the antenna arrays formed by
the integration of planar radiating antenna elements. These antennas
operate over multi-octave bands from 2 to 20 GHz and from 8 to
40 GHz. The cross polarization level of these antennas is about
20 dB below the main beam and they are well suited for applications
in point-to-multi-point communications, wideband radar applications,
and security systems. Our circular polarized antenna designs
are well suited for mobile communications. The antenna arrays
have been further integrated with low loss wideband phase shifters
(forming ESA design) providing +/- 30 degrees scan angle. Performance
of our antenna design is shown in Figure 1.
Figure 1: Performance of RST Antenna design
Beam Scan Technology
RST Scientific Research, Inc. has developed extremely low loss
wideband phase shifter design. This low loss phase shifter design
operates with a frequency and bandwidth up to 40 GHz and beyond
with less than 1 dB loss up to 20 GHz and less than 2 dB loss
up to 40 GHz [US Patent No. 6,987,488].
The system architecture developed allows the entire phased array
to operate using a single low-loss broadband phase shifter. Typical
performance of our phase shifter design is shown in Figure 2 and
Figure 3.
Figure 2: S11 and S12 parameters of Phase shifter
Figure 3: Performance of Phase shifter design
New Phase shifter design provides over 400 degree phase shift with
less than 1 dB up to 20 GHz and less than 2 dB insertion-losses
up to 40 GHz.
Phase shifter design based on multi-line configuration is capable
of controlling up to 8 active antenna elements (T/R modules integrated
with radiating antenna elements) with a single voltage. Using such
architecture, the number of phase shifters and drivers are reduced
by 8:1 ratio, thus providing significant reduction in cost, size
and DC power consumption.
