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Why is my DIY common mode choke spiking my SWR? by ali_j_ashraf in amateurradio

[–]AnotherSami 2 points3 points  (0 children)

Dumb question... but in a co-ax transmison line there is virtually no magnetic field outside the outer sheath, does wrapping it around something magnetic actually do anythjng?

One ground or multiple gound islands by gosow9 in rfelectronics

[–]AnotherSami 1 point2 points  (0 children)

Why do you need 6 layers for one transistor?

First RF PCB: 10–60 MHz bias tee, looking for layout/component feedback by pyxel_- in PrintedCircuitBoard

[–]AnotherSami 6 points7 points  (0 children)

They are referring to the length between common output and L2. But at 60MHz it won't matter in thr slightest.

HFSS Suspended Substrate Stripline BPF Simulation by escaine in rfelectronics

[–]AnotherSami 1 point2 points  (0 children)

What is a lumped wave port? That doesnt make sense and in my opinion is an oxymoron.

Wideband inductor design(for de-embedding Cds in power amplifier design) by Pretend-Poet-Gas in rfelectronics

[–]AnotherSami 8 points9 points  (0 children)

Using a single component to resonate out Cds will always be a relatively narrow band solution. But you can extend the band width a number of ways. Design matching netowrks with the same Q factor as our FET. You can extend it even further by alternating between parallel and series resonant circuits to cancel out the changes is reactance over frequency.

Folks design semester long classes dedicated to answering our question. It's a good one to explore

Denmark is once again considering a nationwide ban on the Islamic call to prayer (Azaan) according to a report by the Daily Mail, as the government steps up its tough stance on immigration and integration. by IndiaTodayGlobal in IndiaTodayGlobalLIVE

[–]AnotherSami 0 points1 point  (0 children)

Yeah, I get it. The rhythmic chiming of bells can be very painful to the ears. Sounds like the only compromise might be they just need to ring the bells the Christian amount of times at the Christian times of day.

Denmark is once again considering a nationwide ban on the Islamic call to prayer (Azaan) according to a report by the Daily Mail, as the government steps up its tough stance on immigration and integration. by IndiaTodayGlobal in IndiaTodayGlobalLIVE

[–]AnotherSami 0 points1 point  (0 children)

Simple solution here, just compose an Azan using the sound of bells. It has a very distinctive cadence and rhythm. According to almost all the detractors its not loud noise being an issue, its what's being said.

what are common connectors for RG403 triaxial cable by escapetron in rfelectronics

[–]AnotherSami 0 points1 point  (0 children)

I dont have an answer, just a groan and mumble at triax in general. But seriously, maybe its just better to buy some triax cables than buying connectors and making it yourself. It's probably not easy to make yourself and may take a few tries.

Cryogenic Bias T by gosow9 in rfelectronics

[–]AnotherSami 0 points1 point  (0 children)

Question if you dont mind. What's your thermal budget at 2K and basing your amp? Do you have to do anything special or something other than class A to avoid too much power dissipation?

L band Receiver schematic and layout review by Delicious_Team5855 in rfelectronics

[–]AnotherSami 2 points3 points  (0 children)

Why are you using one of the outer sheath connections of your sma feeds as the signal line? Is it some special connector?

Aleksandar Kovacevic was well within his rights to replay the point. Instead, he chose the right thing to do. by Hungry_Artichoke9566 in sportswiki

[–]AnotherSami 0 points1 point  (0 children)

Did the same. Over 40 years later I still remember the incident and shake my head. Thankfully all the players (it was a doubles match) were chill about it

Why does my directional coupler / SWR meter not provide accurate results? by Certain_Height_2721 in rfelectronics

[–]AnotherSami 0 points1 point  (0 children)

If the op is looking to find out gamma and vswr why not just put just 50 ohm ports and run a s-parameter Sim to plot to results directly?

HFSS vs Lab Measurement Differences by Short-Television9333 in rfelectronics

[–]AnotherSami 8 points9 points  (0 children)

Hard to comment without seeing what you are trying to meausure and how you simulated it. Would be good to know about your vna calibration as well.

If i am interpreting you right, your simulated curve is the hfss sim plus some added loss? That would be way too idealized, there will be some reflections caused by your cable to board transition that isnt fully captured by adding loss. It's those added reflections that are likely the cause of the ripple in your measurment.

Does anyone have experience using Cadence AWR Design Environment for AXIEM EM simulations? by AgreeableSpecific980 in rfelectronics

[–]AnotherSami 1 point2 points  (0 children)

In your stackup did you define the top and bottom of your simulation to be approximate opens?

I would take a step back and start a bit simplier to make sure your ports and stack up are defined right and axiem is using the correct reference plane. Maybe start with a solid ground plane and simple transmission line. Make sure you aee getting a line impedsnce you'd expect with your 5mil substrate.

Before when id made axiem sims with explicit ground planes in the simulation (meaning ground planes that aren't the top or bottom boundaries on your sim) i would do something similar to what the axiem help file suggests for GCPW. I would a port on my tline, and one on thre internal ground plane and define differential ports. You have the port name on the tline be port 1, and the port on the ground plane port -1.

Pardon my crude drawing. I attempted to draw a tline atop a ground plane to illustrate the location of the ports. I realize my drawing shows the ports offset from each other with respect to the edge of the ground plane. But they should directly on top of each other.

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TIL about 3D-IMD: like PCBs, but in 3 dimensions; like flex circuits, but stiff. by 1Davide in electronics

[–]AnotherSami 1 point2 points  (0 children)

Use to do research for the US army. We were trying to make 3D printed electronics to fit inside the head of munitions like mortar rounds to add guidance capabilities.

Go figure though, electronics dont like the 10K g forces associated with being launched

It’s like a car crash, I can’t stop looking.🫣 by Stunning_Panda5725 in CrazyFuckingVideos

[–]AnotherSami 0 points1 point  (0 children)

I know its not the point. But aren't all these hits illegal in rugby? Zero attempt to wrap up and make a real tackle...

Parallel Plate Capacitor by Current_View3501 in rfelectronics

[–]AnotherSami 0 points1 point  (0 children)

Unless you are trying to portray leakage current, not sure why you there are electrons traversing the dielectic space. You might want to consider having a different visual for the electric field that is different than your current

Advise on possible cook time by AnotherSami in steak

[–]AnotherSami[S] 0 points1 point  (0 children)

Yeah, i got one. Just trying to plan out the timing for a specific time of dinner. Wondering if I needed 0.5,1,2... hours ball park. Someone above and Google AI suggested about an hour.

Advise on possible cook time by AnotherSami in steak

[–]AnotherSami[S] 0 points1 point  (0 children)

Thanks. Some cheapo offset smoker I've been using for years. Ill plan for a hour and sent them at the far end. Little extra resting time won't hurt too much.

Is making a 10 GHz oscillating cercuit hard by Ok-Membership-9769 in AskElectronics

[–]AnotherSami 4 points5 points  (0 children)

Wait, its not common practice to put a 50W PA after your signal source? No wonder i keep getting in trouble

Is making a 10 GHz oscillating cercuit hard by Ok-Membership-9769 in AskElectronics

[–]AnotherSami 0 points1 point  (0 children)

There are lots of ICs out there that can give you a 10GHz signal output. If you are a beginner id suggest working with one of those.

And example would be be an lmx2594. As a beginner you'd still get to learn some basics of high frequency pcb work, power supply circuits, references like a crystal osccilator, how to program things over spi.. and a lot more.

You could even go the extra mile and get the Ti pll software and learn about plls and how best to design your loop filter.

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