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31 Threads found on Semi Rigid
SMA connector is specified with typical VSWR of 1.03 at 1 GHZ, I guess it's even better with right semi rigid cable. Residual derivations from ideal connector behavior are probably rather arbitrary or related to wear and thus not reproducible. I don't expect an useful equivalent circuit describing it.
Possibly this question should go under hobby... Does small semi-rigid or rigid coax with approximate air dielectric exist? I'm thinking of a diameter to the nature of 0.047 inch for making baluns and impedance transformers. The lower z would make it easier to go up in frequency. I see larger cable using a spline to support the center (...)
For such high RF power you can make a power splitter using semi-rigid coax cables. Ideally the coax cable impedance should be 70ohms:
Hi Guys, I want to make an end loaded dipole antenna using a semi rigid coax cable. The antenna should operate at 5.8 GHz. I have the cable with SMA connector attached to it and am looking at how the cable may be converted into an antenna.
If the frequency range is actually up to 36 GHz, the test port connectors of your network analyzer and available calibration sets will prescribe the useable cable connection. In case of doubt some semi-rigid type. You also need to design a coaxial-to-stripline transition.
It can happen if you test jig is not calibrated with the Network ANalyzer. Poor quality cables and connectors can add phase shift and losses. Always use semi-rigid coax for better results. The s21 series insertion loss is related to the shunt return loss of both the input and the outputs, so the s11, s22 may have different Series and Parallel reso
Hi, I need to do some return loss measurements on a PCB and was planning to use a piece of open-ended semi-rigid (034 size) with an SMA on the one end. This will allow me to solder the outer to a nearby ground pad and the inner conductor to the test point in question. To calibrate to the end of the "probe" I was planning on just doing an open
The gap consistency is just almost as sensitive as the length. i would use semi-rigid 1/4 copper plumbing or 50 Ohm semi rigid coax if terminated. You want to conjugate match your load to source.
In additional to all.. You're using SMA connectors but your filter seems working higher than 26GHz ?? Is that correct ??? If it's so, the connectors with semi-rigid cables can create this problem.
I want to test BT over long range (>1km). I am looking for a flexible 50 cm coax cable to connect transreceiver to antenna. RG316 seems to be the best fit. RG405 would be even better, but it is semi-rugged. Is there any flexible alternative to RG405 that is flexible, not very thick and has similar characteristics? If not, how would you rate RG316 c
I would suggest that you add the proposed feed structures to the antenna. You can use two semi-rigid coaxial cables with their outer shields soldered together. The pins of the cables would need to be excited 180 degree out of phase. See and , especially the figure in slide 16 of . I would suggest that you add such a structure to your m
Someone use to make semi-rigid coax with two center conductors for use as power dividers. Does anyone remember who the source was?
I'm not aware of a 25 ohm connector standard. Using two parallel 50 ohm connector seems a suitable workaround. You can buy 25 ohm semi-rigid cable, but there's no connector for it, I think.
They used -probably- 50 Ohm semi-rigid coaxial cable to build Balun/Impedance Transformer and ferrites have been used to improve/wider bandwidth. Nothing special in this picture.You can make it by yourself.
Does anyone has a table with semi-rigid coaxials, dimensions vs frequencies? Does internal diameter have to do with the frequency?
I'd recommend for you to make yourself a passive resistor probe. Use 1/8W (or even better 1/16W) resistors, value around 220Ohm. Put two of these resistors in series, minimizing the leads to no more than 1.5mm. After them solder a 50Ohm semi-rigid cable (like UT-141). This gives you a 500Ohm probe, that is 20db attenuation ratio. Probably 500Ohm wo
Hi, there I 'd like to find some reference on simulation of coaxial balun. can anyone give me some advice? also I am confused about the impedance calculation of coaxial of say a EZ90-25 series semi rigid cable. From the datasheet we can see that its impedance is 25 ohms with outer diameter of 90 mils and that of inner of 40 mils, also we can
Below are the specs for both cables: At 1GHz, RG402 (2.2mm) has 0.64 dB/m attenuation, when RG405 (3.58mm) has 0.37 dB/m. As a general rule, a thicker coax cable have lower insertion loss and higher power capability than a thinner one, with t
I have gone for prescan of our board to an semi anehoic chamber and we found that radiation mentioned by me above is due to a RGMII_TX/RX_CLK line which is 11inch long trace. RGMII_Clk line trace is made(11inch) intentionally to add delay of of 1.5/2ns which is required between data and clock line as per RGMII specification. These lines are also g
I don’t know what kind of antenna you are using, but if is a vertical antenna, the ground provided could affect dramatically the VSWR. For example vertical antennas needs ground radials, if are connected in the top of a pole. RGC-58 RFS-KMP, is a semi-rigid coaxial cable and should be fine for UHF applications up to 50W. Anyway, 2:1 VSWR