You have to be careful with the low-loss high frequency (40GHz) cables,
even if they are armored. We've seen them change insertion loss
dramatically by several dB just by moving them a little bit. They then
gradually drift back to nominal.
Regards,
Rob
"Grace Lin"
<gracelinnj@gmail
.com> To
Sent by: [email protected]
[email protected] cc
Subject
07/16/2008 07:23 Re: Low Loss Coax Cable
AM
Hi Brian,
MegaPhase carries low loss cables (http://www.megaphase.com/test06.html).
Several commercial labs in the northeast of the US use its cable.? Order
"EM40" for flexibility even you don't need performance up to 40GHz.? EM18
is not flexible and too difficult to connect to instrument.
The person who performed our NSA uses cables?made by Micro-coax (
http://www.micro-coax.com/).? From this link,
https://www.micro-coax.com/secure/(wk1c1ujm3fbhqjfmk2qho3fg)/MCConfigurator.aspx
, click "Select Cable Type", you will find informaiton for diffierent cable
types.? The diameters of 0.14" and 0.205" are flexible.? I have UFB311A
(not as flexible as I like) and UFB142A (flexible)?with 12" length.
My colleague ordered a PHASEFLEX cable from W.L.Gore (
http://www.gore.com/en_xx/products/cables/microwave/test/gore_phaseflex_microwave_test_assemblies.html
).? It is very flexible and durable.? W.L.Gore provides online purchase and
can be received next day (
http://consumer.gore.com/webapp/wcs/stores/servlet/ProductDisplay?catalogId=10401&storeId=10401&productId=10854&langId=-1&parent_category_rn=10101
).
The price range for the?above mentioned cables?is $300-$1000.
Regards,
Grace
On 7/15/08, Kunde, Brian <[email protected]> wrote:
What coax cable types do you recommend for a very low loss cable up to 6Ghz
but also flexible?? I need a good low loss cable to connect between my horn
antenna and the floor connection of my Heliax.? The cable only needs to be
5 or 6 feet long but flexible enough so I can change polarization on my
antenna.
I have looked at many cable types in catalogs and on-line but you cannot
tell if it will be flexible without seeing it for real.? I ordered a cable
called "Helical Super Flex".? I liked the low loss properties but it was
not at all flexible, let alone super flexible.? It was barely semi-rigid in
my book .
I tried RG393/U but it is not very flexible and I prefer a lower loss cable
if possible.
What do you all recommend?? What is the best?? Where can I buy it in small
quantities and possibly in custom lengths?
Thanks to all in advance.
The Other Brian
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