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114 Threads found on Port Match
You could make a coax cable using cylinders and define the inside dielectric as the wave port surface. Then normalize the waveport to 50 ohms and you should be able to match your SMA.
One of your connectors almost resembles an 8-pin mini-DIN, the serial port on early Macintosh computers. I say 'almost' because the pin spacing is off. It can only be a substitute if you were to do some precise drilling and soldering. Your connector also does not match the 7-pin version.
This is a very simple problem; the dielectric constant will affect the width of your transformer and basically you can have any Er that is available to you. You will have a port at each end of the transformer.
Hi, I have designed a PCB for a radar system that is supposed to function at 5.8GHz. The board has been manufactured and populated; however, when I measure the return loss at the return port, I only get 1 or 2dB. Part of the reason appears to be that the capacitors that I used on the RF line (that are used to match the input of the low-noise amp
Part of the sweep input goes to the instrument, part goes to a RF bridge which has a precision termination inside and a test port to the outside world. The unbalance output from the bridge goes to the instrument. So if you use the sweep as your horizontal time base, then if you have a good match on the test port, the output would be low (...)
Hello everyone. As a small test of the effect of port shape and size on their value, I've built a simple current loop of random dimensions with a capacitive element to make it a resonant structure at 128MHz. Looking at the eigenmode analysis result it behaves like it should. However, when I want to inspect its frequency behavior through a lumped po
The difference is in how you set up and define the port. S11 is a measurement of how much energy is reflected back. So in one sim, you have a good impedance match at the port, and in the other you don't. Check your port definitions to make sure the impedances are the same, say 50ohm or whatever. I think CST has a (...)
Right. CST is very easy to add port or lumped elements.
i have designed an antenna and viewed its gain plot by using HFSS software but i'm getting high gain not at desired operating frequency, i think this is because of impedance mismatch problem, could someone please help me regarding this of getting high gain at desired operating frequency. Thanks in advance.
Hi All, I am Wasim from Wisconsin-Madison. I am new to ADS simulations. I am willing to simulate a mixer IC by Hittite in ADS. There are no direct modules provided by the vendor so I am using data-items and s-parameter file provided by the vendor. However I found that only reflection parameters are provided in the s-param file corrospon
For very high frequency 2 stage LNA, we also need to match the interstage impedance. I know for input output matching,we can add 50 ohm port to let input and output to matching to 50ohm. While for the interstage, how do I match the interstage, I can't add a port between the output of the (...)
Its quite clear. the ICI port is a icache_in_type in the component declaration, but the iu.vhd uses std_logic_vectors. Therefore the types dont match. You need to have th same types on the component and the entity. By the looks of the vsim load - youre using a netlist for simulation?
Pi match attenuators at all ports would help especially in diode mixer case. Active mixers generally don't need very good (and wideband) 50 ohms terminations at the ports. The most important port that requires good termination to get good mixer IMD, is the IF port.
are you using a separate component and entity? do the port definitions match between the entity and component?
You would need at least 5 signals (4 for channel select and one for the I/O) and more for the enable or you can tie that high. You need to define your port for I/O that you want. Set your port for the channel you want select (0-15) and write your ABCD value to match the channel you want then either read the input or write the output. That (...)
Resonance (when looking from a 50 Ohms port) is not required for the chip as the chip doesn't show a real load to the antenna. You need to have an almost conjugated match. If the chip has an input impedance at operation of 40-j60 Ohms (just an example), your antenna should present 40+j60 Ohms to the chip to have a good power match. So (...)
Does the impedance match? You can try to set the port impedance to 50Ohm and disable the normalization. Then just look at the simulated impedance. From there you can calculate the S11 between the impedance of the antenna and the chip. This can also be done in HFSS with the output variables calculations so you can use it for optimizations. (Some
It is always a good idea to specify your compiler, in this case it seems to be codevision The code is quite simple so you just need to chance the port if portb is not available in attiny and also change the pin number (portB.x) if you are using different pins. You also need to chance the included header to match the chip (...)
when using starRC do extraction, I found that the port location presents after *|I (M2 ...) are not match the port on the layout, what is a possible issue caused this ? Is there some setting i need to set ? many thnaks
when using starRC do extraction, I found that the port location presents after *|I (M2 ...) are not match the port on the layout, what is a possible issue caused this ? Is there some setting i need to set ? many thnaks
Guys, I got error on reading STM32 : What should I fix ? thanks **JLink Warning: Identified core does not match configuration. (Found: None, Configured: Cortex-M3) * JLink Info: TotalIRLen = 9, IRPrint = 0x0011 **JLink Warning: Identified core does not match configuration. (Found: None, Configured: Cortex-M3) **JLink Warning: CPU not halted
Check balun impedancece. Balun could be 50 to 100 that meakes you blind for 50 ohm as other port is terminated with 50 ohm. if balun impedance match with antenna then one should do not see bad RL
hii, i need help, i hav use hfss 11 an problem encounter when i analyze my hfss antenna port 'Waveport1': No non port face could be found containing a terminal edge assignment. port refinement, process hf3d error: Number of terminals does not match the number of modes requested. Verify (...)
I try to design impedance match 50 ohm to 75 ohm. Could any one guide me how to simulate it: try use wave guide port or lump port? 89364
I have looked at your file and the problem is the location of your port. I have amended the port dimensions and locations and this has fixed the port problem. The S11 however shows a poor match so look at your material and see what the problem is. You could perhaps use an FR-4 substrate and copper at the top? Just a (...)
how can i port android on lpc1788 ? I´m not sure if you can do that with cores less than ARM9 / ARM11 / Cortex -M4 / Cortex -A8 / etc... +++
I used ATmega32A to scan a keypad every 30ms. I want to create interrupt in Clear Timer on Compare match (CTC) Mode. But interrupt is not working. What is the problem in my code? Code is included here. #include //#include #include // port Mapping #define KEYPAD_UPPER_port_DIR DDRA #define
I want to excite a capacitively loaded coil for wireless power transfer studies. I used a coil connected to a port on the airbox by a parallel transmission line. However the mode of the coil was not fully excited. Any ideas of how to match the signal passing through the waveport to the capacitively loaded coil? Thank you
not familiar with that exact model, but basically baluns made to perform differential tests have: 1) a lot of loss (maybe as high at 9 dB) 2) not necessarily a good impedance match on the differential port 3) There can be significant electrical length in the device. The short/open measurement thru this device, as you show, is not at the smith cha
Hello, There is a nightmare called CPW pcb design. I have an FR4 board (1mm thickness) and I need to match two ports. One port is 50 ohms and the other (antenna) is 23+j38 on 2.4GHz ISM band. Of course I need to introduce some attenuation on harmonics too: 4.8GHz and 7.3GHz. Apparently simple for someone using Ansoft Designer (...)
Hello ,i'm new to hfss and this forum and i have a question that i hope will be answerd: i'm trying to simulate a 20mm radius circular waveguide in hfss. i did a port solution only on the first 6 modes and only the 3rd and the 6th mode made sense to me . that matched my analytical calculations concering the cut-off frequancies and the (...)
This is related to the Z0 problem in your other post. For wave guide ports, some 3D simulators define Z0 as line impedance at the port ("generalized S-parameters"). This means that any straight line will have perfect match, no matter what the dimensions are. However, the simulator does know that Z0 value and can re-normalize the (...)
you need to load modelsim and use the vsimulink command instead of vain to make sure the link is established. also mke sure your port definitions on simulink match. I suggest looking at the cosimulation examples in simulink.
Guys, I really would appreciate your help in matching this 5-element semi-circular dipole array which is excited by 5 lumped ports in HFSS. What offset excitation port phase under Edit Sources do you use when matching it? Is it the same phase I want to steer it at? I read in Stutzman book that arrays are usually (...)
Hi friend U should watching video in folder cst set up. It's very useful for beginer with cst. u want to match with your port, i think u should tuning about your parmater when u simulate. it's difficult to talk about u - - - Updated - - - Hi friend U should watching video in folder cst set up. It's very useful for begine
11. TYPE IO8 IS ARRAY (7 DOWNTO 0) OF STD_LOGIC; 199. SIGNAL T: IO8; 200. SIGNAL Q: IO8; 214. stage9: SWITCHBOARD_EB007 port MAP (CLK_IN_CPLD, RESET_CPLD, T(0), Q(0)); T(0) is the lsb of T, which is an 8b value. 12. BIT_IN_SWITCH: IN IO8; The port doesn't want T(0), as T(0) is only 1b. The port wants something that i
Hi, I am trying to match input impedance of LNA with antenna impedance of 50+1000j. While tuning the input matching network, i did s-parameter and PSS analysis in cadence, using input port of 50+1000j impedance, but i am getting some strange results. Firstly for input port impedance of 50+1000j, s-parameter analysis (...)
Hi, I have a T-splitter with the attached configuration. It has quarter wave matching section to match the narrower feedlines to the 50ohm line. My problem is how to terminate the antenna at port 2 & port 3 with a load impedance of 50Ω? Cheers! Humayra
Just add a 50 ohm port.
Yes, it works in any AVR, all you have to do is change the port pins defined in the header file to match the ones you use in your schematic. Alex
Hi everyone, I have a problem with Ansoft designer. I need to match an amplifier on analog devices module, and all I have is the optimal impedance. The port is differential and I am a bit lost how can I model that and start doing the matching. The matching itself shouldn't be that difficult with a balun, but how to make the (...)
I haven't used bus pins for components. If that could even possibly be it, a debugging step would be to break it out into normal pins. In-re pic #3: I think that the wire label and the bus label must match each other exactly (except for the index number at the end). But don't NEED to match the port name, particularly in a hierarchical (...)
energy_baz, Yes that code should work once you fix the "end GENERATE mo;" to match the declaration at it's start. The generic map statements seem to have too many brackets. Though I do not know why you would write this code, as it would be less to simply write the port maps. Hope that helps Sckoarn
Hello. I would like to ask for help in editing my footprint for ATF-36077 in Ansoft. I have edited the pins and padstacks. I modeled the transistor as a 2-port network with a reference node so number of pins is 3. The number of pins are the same but still the error Old and new footprint doesn't match still appear. What to do?
Hi folks Here is a paper by G Adams on resistive power dividers. Can anyone please explain to me table 1 ? The paper says if u get 1.7 db loss from port one to port 2 , u'll get 20 db loss from port 1 to port 3 can anyone derive this?
Hi CDWest Lumped port connecting only to one point but the input have width so it's not accurate. use face port or wave port it's better look also at this examples. the ic is in the middle. look also at the concept of feeding. Plasma
Actually the conversion loss of the single-end resistive mixer improve for higher LO level, peaking a top limit which depends by the bias point. Conversion loss of these type of mixers is sensitive to the RF and IF port impedance match. This impedance could change for different LO levels. Is recommended to terminate the RF and IF ports with (...)
On a smith chart, a negative resistance port will show up OUTSIDE of the unity circle. So you will have to scale out the smith chart to even see it.
Hi Conjugate match is taking into account that a device (a transistor) is a two port device and doesn't assume that the signal flow is unilateral. In other words, the input impedance is dependent on what is connected to the output and vice versa. On the other hand, power match is, as BigBoss explained, only concered with maximum power (...)
hello any1 having hfss full video tutorial i have the full book of hfss but now i am facing a problem in the excitation of wave port i have downloaded hfss v11 form the internet. Does any1 having idea that it works properly. it is giving me error in the in the analyse all step the problem is that, it is saying the no.of modes and termina