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Recent content by coolpixs4

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    How could it be 28~30dBi gain? Can anyone explain please!

    How could it be 28~30dBi gain "Model: GJX-698-2700-30"? Can anyone explain please! I search for 915MHz high gain antenna and found this: https://www.amazon.com/Tgoon-GJX-698-2700-30-Omnidirectional-Antennas-Connector/dp/B0B2VL5NL3 Does it means with the max input power +/- 2dBi antenna gain ...
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    How to design high power RF trace on thin PCB RF-4 to meet 50 Ohm trace impedance?

    Thanks for your comment. But the substrate structure cannot be changed due to relating to other parts of other works, they just request me to re-design a microstrip power splitter for a 10W RF signal (each branch) to two antenna ports the trace at each end port must use the width of 1.1mm (for...
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    How to design high power RF trace on thin PCB RF-4 to meet 50 Ohm trace impedance?

    I need to design a microstrip power splitter for high power RF signal of about 40dBm (10W) on a PCB of FR-4 (Er=4.5) with 4-layers( 0.5oz/0.11T/1oz/0.2T/1oz.0.11T/0.5oz) So, by using ADS-LineCal tool, the calculated 50-ohm trace impedance results in a very small width of the trace 0.192mm I...
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    Need help with coil inductor marking and reading !?

    Thanks, so what does it means of 0.38" = ? Anyway, L1 — 3 Turns #16 0.25″ ID = ?uH L2 — 6 Turns #16 0.5″ ID = ?uH L3 — 7 Turns #20 0.38″ ID = ? uH or part number please
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    Need help with coil inductor marking and reading !?

    Need help with coil inductor marking and reading !? what does it mean? I got this from datasheet MRF426, so I can't convert its parameters into real inductor values = ? uH L3 — 7 Turns #20 0.38″ ID 7 turns = number of turns #20 = ? 0.38" = ? copper wired diameter ? ID = ?
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    What type of this IC part number? [need help]

    You are right, it is a square wave at the OSC2/CLKOUT (the pulse width of duaration T=360us for 'one symbol') but it is not a simple squarewave of a series '1' & '0' : 0101010101010101... It is hardcoded to include data, such as if GP0/GP1/GP2/GP3 (equivalent to 4 buttons) at standby mode...
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    What type of this IC part number? [need help]

    Recent, the CLKOUT is at T=360us (about 2.778KHz) I want to make it slower at T=800us (about 1.25kHz), what can I do ?
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    What type of this IC part number? [need help]

    Based on the OOK/ASK modulation To reduce the Adj channel leakeages (offset 12.5KHz/BW=8.5KHz) , it should be ... slower symbols or smoother symbols Or Then, how do I can control OSC2/CLKOUT data rate at lower/higher frequency ? without using extra component such as LTC6993 IC Recent...
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    What type of this IC part number? [need help]

    Thank you so much That's what I need, It doesn't matter. I can reprogram IC to get data output at 8KHz The IC is PIC12F683-I/P - PIC12F683 Flash 8-Pin 2kb 8MHz Microcontroller
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    What type of this IC part number? [need help]

    Dear Expert, Is there anyone who knows or has knowledge about this IC ?, I want to know its part number or a similar IC function (it doesn't have silk screen name on top of the IC so I don't know its name, but I know its functions) Its function is a one-shot random pulse generation IC which is...
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    Need help or suggestion, related to 5GHz Antenna design for UAS & GCS

    Dear all experts and edaboarders, I need help or suggestion, related to 5GHz Antenna design for UAS & GCS (Unnamed Aircraft System & Ground Control System) I am looking for any references document related to the above topic, if you have it please share it for me It can be documented (such as...
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    Need help for ADS equation reprentation...

    You're so sweet, Thank you @volker. I got it. ------------------------------------- This might be help someone need for references: https://www.rfcafe.com/references/electrical/pwr2volts.htm
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    Need help for ADS equation reprentation...

    I want to convert the output plot from dBm to mV But I don't know how to express exponential equation in ADS as Eqn I'd checked it out from ADS help, but only find the exp() ... P[dBm] = 10*lg (Po[mW]/1mW]), & consider Lload=50-Ohm For example: how can we express a^b in ADS Equation ...
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    I need your comments diversity antenna distribution system for UHF broadband

    I also don't know why ? and what are the reasons?, but a lot of our products on sale already get A/S because of damaged LNA. And I also have a wonder that the BL022 itself has some problem; that's why Berex company discontinued this IC and release a new name BL022A with same spec's.
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    I need your comments diversity antenna distribution system for UHF broadband

    I have designed a diversity antenna distribution system for UHF broadband My first design as Case 1 (attached picture) Port 1 is comming from Antenna 1 Port 2 is comming from Antenna 2 It is a diversity antenna distributor system to multiple receivers. If port 1 is fed by 10dBm RF signal the...

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