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Hi all,
will the magnetic field from magnet affect the antenna performance?
say a PIFIA wifi antenna at 2.4GHz.
my point of view is the magnetic field is static and does not radiate in any frequency, so it wont affect the antenna.
so from antenna point of view we should just treat it as a...
i understand. my point is i wanted to prove to the guy that if he suspect the the TIS degradatio is coming from antenna itself mean our antenna degrade >70% from ch6 to ch11. i just want to confirm my calculation is correct.
50% from ch6, degrade 6db so my ch11 antenna is 10+%?
yes, i understand that. that why i said assuming no inteference from the system itself. just wanted to see purely from antenna angle.
let say my wifi antenna is 50% at ch6 and the TIS degrade 6 dB from ch6 to ch11. so there is 70% lose in antenna at ch11 compared to ch6, that mean my ch11...
hi all,
let say i have 6dB OTA(over the air) TIS delta between my WIFI ch6 and ch11. I measure the conducted TIS for both ch6 and ch11 both reading are comparable.
assuming no noise inteference from my device system. can i say my antenna efficiency degrade 75%(6dB) from ch6 to ch11??
thanks
Hi all,
i'm testing my device WIFI 5G 160m bandwidth throughput test with iperf.
I'm using Asus axe11000 router and test was conducted in a sheilded room.
below capture is my test result. the top one the is downlink performance which is ok.
but the btm one the uplink is very bad.
with the same...
Hi all,
which antenna is better in term of efficiency and bandwidth.
PCB or FPC?
and which one is more immunity to detuned by proximity object(human hand/body/plastic case/metal)
thanks. so much clearer now.
btw can i use the same on tx side?
if i tx 20dB, i attenuate 6dB device still working mean distance double. then i continue to attennuate another 6dB
packet loss still acceptable, i double the distance from previous distance.
can this work? without knowing the...
let say i have a 2 device one side is tx and the other side is rx
both device is 3m away.
i start to tx at 10dB and check the packet loss at rx.
i keep on attenuate the power in tx until the packet loss is too high.
from the attenuated power can i calculate what is the range of the device that...
how do i design the bypass capacitor on the dc biasing line for an amplifier.
how to i decide the value i should used to attenuate high frequency noise from dc line going in the the frequency of interest, for example gps 1575, cell low band of 800Mhz, cell high band of 2100Mhz.
should i choose...
Hi ,
I encounter this difficulty when matching my off the shelf GPS antenna to 50 ohm.
hope someone could tell me whats when wrong and how to debug.
so the original load impedance was shown in the pic below.
i have a "series-shunt-series-shunt" matching circuit before my GPS antenna. series...
Hi guy,
i'm currently doing pcb simulation with CST. i have some basic question to ask here.
let say i assign a discrete port in my PCB for a series component as shown in figure below
In schematic tab i assign this discrete port as lump component. the connection is shown in below. am i doing...
Hi
how do i choose the decoupling capacitor for DC bias line to a IC.
i think 0.1uF and 10uF are common one.
But what if i have a cellular switch IC which operating in different cellular band lets say 800MHz and 2100MHz.
how do i choose the value of the decoupling capacitor for the dc bias line...
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