7-2019

RF & Wireless
Microwave Rotary Joint
Frontend Solution for
Enterprise 802.11ax
Applications
Millimeter-wave
Waveguide Antennas
Up to 220 GHz
Link Microteks microwave
rotary joint is key element of
new Ka-band satcom-on-themove
antenna system from
ADS International. A dualchannel
Ka-band microwave
rotary joint designed and produced
by Link Microtek is
playing a crucial role within
a new stabilised antenna platform
developed by Italian
firm ADS International S.r.l.
(information@ads-int.com)
for high-end satcom-on-themove
(SOTM) applications.
Typically mounted on vehicles
for either commercial or
military use, the new ADS
system features a low-profile
radome that houses a 4-port,
wideband flat-panel waveguide-array
antenna together
with ancillary hardware.
Operating at 19.2...21.2 GHz
in Rx and 29...31 GHz in Tx,
the dual circular polarisation
system covering military and
commercial Ka-band is ideal
for the latest high-data-rate
requirements and, being fully
European made, is free from
any ITAR/EAR restrictions.
Key to the operation of the
ADS antenna system are two
of the Link Microtek rotary
joints – one for azimuth and
one for elevation – which
enable RF signals to be fed
from the static side of the
system to its rotating side.
The central transmit channel
of each rotary joint is implemented
in WR28 waveguide
and delivers up to 50 W of
microwave power (CW) over
the frequency range 29 to 31
GHz with an insertion loss of
just 0.5 dB and a SWR of 1.3.
This allows the signal from the
BUC, which is connected to
the system port, to be transferred
through a waveguide
transmission line all the way
to the antenna, thus minimising
losses.
The outer receive channel,
meanwhile, uses SMA coaxial
connectors to cover L-band
frequencies from DC to 2.15
GHz with a maximum CW
power of 10 W, as well as providing
the DC voltage needed
for powering the two LNBs
which are located on the rotating
side of the system, right
on the back of the antenna
with the aim of maximising
the G/T. Isolation between
the channels is greater than
35 dB. Manufactured from
aluminium, the rotary joints
weigh only 160 g and measure
49 mm in length with a
body diameter of 36 mm and
a flange diameter of 55 mm.
■ Link Microtek, Ltd.
sales@linkmicrotek.com
www.linkmicrotek.com
Skyworks introduced the
SKY85726-11, a 3.3 V 5 GHz
frontend solution for enterprise
802.11ax applications including
access points, routers and
gateways. This fully-integrated
module features a logarithmic
power detector supporting wide
dynamic ranges and low power
consumption, enabling improved
thermal management. In addition,
the SKY85726-11 offers
best-in-class linearity with 2 dB
higher gain and 50 dB antenna
to receive isolation.
■ Skyworks Solutions, Inc.
www.skyworks.com
4G/5G Switch offers
High Power Handling
RFMW, Ltd. announced design
and sales support for a Silicon
on Insulator (SOI) switch from
Qorvo. With 0.35 dB insertion
loss in a symmetric topology,
the QPC3025 provides excellent
linearity while handling up
to 20 W of CW power and 30 W
of pulsed power with a 50 ohm
load. No blocking capacitors are
necessary for applications from
30 to 4200 MHz. The QPC3025
SPDT is reflective and offers 39
dB of isolation. Operating supply
voltage ranges from 2.7 to 5.5
V. Applications include 4G/5G
repeaters and boosters, military
and public safety radio. Offered
in a 5 x 5 mm QFN package.
■ RFMW, Ltd.
info@rfmw.com
www.rfmw.com
Pasternack has released a new
line of waveguide antennas designed
to address R&D, military/aerospace,
experimental
radar, test & measurement and
wireless communication applications
from 40 to 220 GHz.
Pasternack’s new line of millimeter-wave
waveguide antennas
consist of 85 new models that
cover broad frequency ranges
of 40 to 220 GHz, feature waveguide
sizes ranging from WR5
to WR19 and offer gain ranging
from 3.5 dBi to 25 dBi nominal.
Five categories of ultra-high frequency
waveguide antennas are
now available to address pointto-point
and point-to-multi-point
wireless applications including
standard gain horn antennas
to 220 GHz, conical gain horn
antennas to 220 GHz, wide angle
scalar feed horn antennas to 99
GHz, horn lens and omni-directional
antennas up to 99 GHz. All
antennas in this series are RoHS
and REACH compliant and are
constructed with the highest quality
materials and workmanship.
■ Pasternack
www.pasternack.com
Dual-Frequency
Omni Antennas
KP Performance Antennas has
launched a new series of dualband
(dual-frequency), omni
antennas offered in 2/3, 2/5 and
3/5 GHz configurations. KP’s
new line of omni antennas consists
of three models, each with
4-ports, dual-band functionality
and horizontal/vertical (H/V)
polarization. These antennas
provide two frequencies in a sin-
60 hf-praxis 7/2019