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That's a great reference, Dragan. Thanks for posting it. It's interesting that IN3OTD found the 0805 pair to perform best. In the Vishay curves, the smaller sizes look considerably better. The Vishay

https://www.qsl.net/in3otd/electronics/VNA_calkit/SMA_female.html <reinier123@...> wrote:

I have seen measurements of homemade calibration loads. optimum was 2 resistors of 100 Ohm in parallel. It performed better than a single 49R9 resistor or 3 x 150 Ohm resistors. Some interesting

When considering a VNA calibration load for various projects, I used to specify two 100-ohm 1% resistors in parallel, which halves stray inductance. Of course it also doubles stray capacitance, which

Jim, That's a good point. I also ran across USB stick Wifi routers, I have to dig into what could be expected there. I did some browsing last night and found some information that although android

It was a busy time. Papers galore. In electrical engineering ( https://en.m.wikipedia.org/wiki/Electrical_engineering ) and telecommunications ( https://en.m.wikipedia.org/wiki/Telecommunications )

* Understanding the bandwidth limitations of small antennas: Wheeler, Chu and today * Publisher: IEEE Cite This Howard R. Stuart ( https://ieeexplore.ieee.org/author/37284431900 ) Sign In or

Harrington & Chu, but yes.

Didn’t Chu - Wheeler nail this one? Ed McCann AG6CX MSEE MIT

One of the exercises we had in grad school was to prove that a radiating structure could be down-sized to 10% of its full and ideal size without losing efficiency, all other parameters being equal.

How you define efficiency? If there’s no loss, then an infinitely small antenna (a hertzian dipole, for instance) just has 1.5 dB gain over an isotropic antenna. Small antennas have low radiation

Exactly which flavor nanovna do you have? What prompted the need for DFU mode? Secondary to physical damage like deceleration trauma or charging damage?? The more info the better. Jason Burchell

It's also pretty easy to set up a battery powered access point that everyone can connect to. In a Field Day scenario, this is handy for logging, and backups and such, because you can hang a backup

The Samsung S4 connected right up with the H with the TCPUART app. When it came to the server portion I had also checked the box to use the connection by default. On my Lenovo ideapad running Win 10

QUOTE (Jim Lux): .....short antennas have a different pattern than full size antenna, but their "efficiency" isn't intrinsically different). Jim, if we address small tuned loops on transmit, the

The TCPUART app enables a simple TCP connection to the IP network, so it should work with any method of getting your phone and the computer on a network with the same IP address space, ad-hoc or

This is using resonance as a choke, not resonance of the entire antenna. You want your choke to be high Z, so that currents don't flow on the outside of the coax. As far as the antenna goes, if you

/g/nanovna-users/message/33097 Roger

Yes, if it has the ability to be a hotspot that would work. An advantage of "connecting both to a network hot spot" as opposed to making the phone a hotspot/AP is that your computer can then hit other

Jim, I agree. I use the terms access point and hot spot interchangeably. Android or at least the old 5.0.1 version I'm looking at on these ancient Samsung S4's have the ability to turn the phone into