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153 Threads found on Coaxial Line
Microstrip lines are same as other transmission lines like waveguide and coaxial cables. So transmission line theory is the pre-request before starting design process. In Microstrip lines it is the length of line which defines your components like inductor capacitor etc. ADS and other (...)
I doubt a point source will couple well to a transmission line mode, but that being said, your best bet is probably to couple it to a coaxial mode -- since I lack knowledge of any literature on the subject, I'd guess that a parametric sweep on the placement of the excitation is an adequate start. Good Luck!
Hi I am working on point to point communication system over dedicated coaxial cable. Required Data rate = 100kbps cable length = 5km I am looking for suggestion/design ideas In one of my previous projects I used wire line modem (CMX866) successfully over similar distance but baud rate was 2400. Can I use two DSL modem ICs for such c
Hello, I am using HFSS V13,and simulating a Planer Inverted F antenna with coaxial feed line.Validation check is successful.But no result found in s11 plot.I attached the view of design.Anyone can help me please?
Hi I'm experimenting with power line communication by connecting 2 modems (Texas Instuments PLC developer's kits) through 100m of RG58 coaxial cable as a model power line and injecting white gaussian noise with a signal generator. The modems exchange modulated packets of data shown in fig 1. I was hoping to see the response of the Bit (...)
I have designed a 10 element LPDA and I want to achieve around 6-7dB of gain but I am getting an issue with the gain plot (see attached). It looks like there is some null on the PHI axis. I am feeding the antenna with a coaxial line and a lumped port at the end. I honestly have no idea why it is doing that... Hope someone on here can shed some ligh
You can try a "bias tee" solution, i.e. capacitor for the high frequency path and inductor for the low frequency /DC path. The task is fully possible. Satellite TV receivers are connected to LNBs in antenna by one IF coaxilal line. It feeds +15...20 V DC to the LNB, 22 kHz oscillator-switching signal, an
How to make coaxial probe for horn antenna in feko. In feko example of horn with line feed i changed parameters and have achieved my desired results now i want to place probe like in hfss Microstrip patch antenna but i have no infinite ground in case of horn. Kindly mention steps and tell me how to know what will be inner and outer diameter for pr
when there is a probe it come with coaxial transmission line too. and its clear how to excite coaxial line with voltage source
Hello, I have a coaxial line of length L. run it at frequency f. No dielectric just one PEC cylinder in a vacuum cylinder. Defined waveguide ports. since this is a TEM mode, I would expect the s21 phase to be 2*pi*L/wl. It's not! What am I missing? Thanks
I understood you have to calculate the length L of a coaxial transmission line at wich the input impedance is a short circuit when it's left open at the other side. at a length equal to a quarter wavelength (and it repeats every rotation of pi) an open circuit at a side of a line will be seen as a short to the other side and vice-versa. (...)
what it mean by 50ohm coaxial feed line . .. how can we define for that
I want to design an antenna element in IE3D.The antenna consists of a pair of folded dipoles.The dipoles are coupling fed by an L-shaped microstrip line.The dipoles are printed on backside of the substrate while the L-shaped microstrip line is etched on the front side of the same substrate and it is fed using a 50ohm coaxial cable. Can (...)
Coax lines have a dominant mode with zero cut-off frequency and theoretically if the coaxial cable is good quality, and its impedance is the same as the source and load impedances at its ends, the cable do not affect the connected circuits and its length is meaningless. Only the insertion loss will change with the length. Sometime, if the source or
Same length of various transmission lines like: stripline, microstrip, coaxial, waveguide, twisted-pair, etc, would give totally different phase shift. On top of this, the same length transmission line made on the same approach (stripline, microstrip, coaxial, etc) would give different phase (...)
You are looking at the insertion loss through the sample length of coaxial line as a function of frequency. These graphs simply show that the loss per unit length of this transmission line increases as the frequency is increased.
No, litz wire won't provide any real advantage at VHF. coaxial transmission line transformers are probably your best bet, and 61 ferrite is a good starting material. Low permeability powdered iron mixes like 17 are more suitable for high-Q inductors, and wouldn't make for a very efficient transformer. Plus I don't think anyone makes powdered iron b
a power of 0dbm is fed to a coaxial cable . this coaxial cable is connected to an antenna. so the power will be sent through the antenna. i know that in RF we could not speak about the voltage. But could someone tell me what is the Voltage and current in the coaxial cable?
A horn antenna is an extension of a rectangular waveguide. To feed the waveguide from a coaxial line you need a transition. Any good connector can be used, SMAs are good om DC to ~18 GHz. \Designing a waveguide-to-coaxial transition is a complex task. This is why empirical designs are used, and a careful adjustment is needed. All that (...)
Hi guys, I am trying to feed a microstrip patch antenna with a coaxial probe feed. Till now I m getting nothing although I have read the circular patch antenna tutorial provided in the help manual. Could anyone please suggest the correct method. I am using CST MWS.