2-2017
Fachzeitschrift für Hochfrequenz- und Mikrowellentechnik
Fachzeitschrift für Hochfrequenz- und Mikrowellentechnik
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Products<br />
Clock Oscillators Offering Tight Stability<br />
Euroquartz has launched a new<br />
range of clock oscillators from<br />
Statek offering tight frequency<br />
stability of ±20ppm over the<br />
military temperature range and<br />
±10ppm for industrial applications.<br />
Available in frequencies<br />
from 10 to 55 MHz, the new<br />
STXO range also offers low RMS<br />
jitter and low phase noise. Stateof-the-art<br />
design, process, manufacturing<br />
and test capabilities<br />
have made the development of<br />
this ultra-miniature 3.2 x 2.5 mm<br />
STXO oscillator possible. Key<br />
performance capabilities include<br />
low RMS jitter typically less than<br />
300 fs, typical noise floor less than<br />
-161 dBc/Hz, high shock survival<br />
options (>20,000 g) and ultra-low<br />
Allan Deviation and period jitter<br />
(1.4 ps RMS).<br />
Supply voltage options are 2.5<br />
and 3.3 V ±10% with current<br />
consumption of 3 mA (no load<br />
across temperature range). Offering<br />
15 pF CMOS output load<br />
with enable/disable and tristate<br />
functions, the new Statek STXO<br />
range delivers fundamental frequency<br />
output with no PLL artefacts<br />
and is housed in a hermetically-sealed<br />
ceramic four-pad<br />
surface mount package. Offered<br />
in versions for industrial applications<br />
over -10 to +85 °C and<br />
military applications over -55 to<br />
+125 °C, the new STXO clock<br />
oscillators are available with full<br />
military testing per MIL PRF<br />
55310 on request. Tighter frequency<br />
stability performance can<br />
also be provided to special order.<br />
Additional specifications include<br />
start-up time of 5 ms maximum,<br />
rise/fall time of 5 ns maximum,<br />
duty cycle of 45% minimum/55%<br />
maximum and low<br />
ageing of 2ppm in first year.<br />
Defence and aerospace applications<br />
include smart munitions,<br />
communications, guidance and<br />
navigation.<br />
Euroquartz Ltd./Frequency<br />
Products Ltd.<br />
www.euroquartz.co.uk<br />
Antennas<br />
Directional Patch Antennas for Body-Worn Tactical Applications<br />
RFMW Ltd. announced design and sales<br />
support for body-worn antennas from<br />
Southwest Antennas. Model 1065-031 is<br />
a right-hand, circularly polarized (RHCP)<br />
antenna while model 1065-032 offers lefthand<br />
polarization (LHCP). Developed to<br />
offer high performance, rugged antenna<br />
options, the antenna radome housing is<br />
resistant to damage from drops, being<br />
stepped or jumped on, and other potential<br />
abuse. Both 1065-031 and 1065-032<br />
antennas are designed for use with handheld<br />
or body-worn MIMO/MANET radio<br />
systems operating from 1350 to 1390 MHz.<br />
Circular polarization offers performance<br />
enhancements in multi-antenna radio configurations,<br />
crowded RF/non line-of-sight<br />
scenarios, and improved performance in<br />
adverse weather conditions providing greater<br />
radio range for law enforcement, military<br />
or civilian applications. Freespace gain<br />
is specified at 4.2 dBic. Measuring only<br />
3.75 x 3.75 x 0.51 inches and weighing<br />
3.4 ounces, the 1065-031 and 1065-032<br />
feature a high performance stainless steel<br />
SMA(f) RF connector and waterproof, UV<br />
stable radome that can withstand immersion<br />
in 20 m of salt water for two hours if<br />
the RF connector is mated or sealed with<br />
a protective end cap. Southwest Antennas<br />
body worn products are easily secured into<br />
pouches, vests and MOLLE gear.<br />
■ RFMW, Ltd.<br />
info@rfmw.com<br />
www.rfmw.com<br />
58 hf-praxis 2/<strong>2017</strong>
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