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ckflight / NRF24_TRANSCEIVER

KL27Z MCU, NRF24 2.4Ghz Transceiver IC and RFX2401C Front End for PA for transmission and LNA for reception.
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does it work? #1

Closed OuyangJunyuan closed 4 years ago

OuyangJunyuan commented 4 years ago

I need pa for my nrf,but i don't know how to designt it . if it work , i would like to change it with my code, i think my code is good

ckflight commented 4 years ago

It is working no problem. You can use the amplifier design on the schematic. I did not make a range test though.

OuyangJunyuan commented 4 years ago

Thanks. it was needed impedance matching from PA to ANT? pardon my pool english

------------------ 原始邮件 ------------------ 发件人: "Cenk Keskin"<notifications@github.com>; 发送时间: 2020年3月10日(星期二) 晚上8:39 收件人: "ckflight/NRF24_TRANSCEIVER_HARDWARE"<NRF24_TRANSCEIVER_HARDWARE@noreply.github.com>; 抄送: "706545330"<706545330@qq.com>;"Author"<author@noreply.github.com>; 主题: Re: [ckflight/NRF24_TRANSCEIVER_HARDWARE] does it work? (#1)

Closed #1.

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ckflight commented 4 years ago

It has microstrip line impedance matching is needed for each RF trace for 50 ohm transmission line. I ordered my pcb from oshpark back then. With their 4 layer stack up 50 ohm microstrip line impedance is 0.34mm. There is also a cutout at the sma connector because pad is wide and it reflects the power back. Therefour sma pad is coupled to layer 3. It's rf design is fine as well.

OuyangJunyuan commented 4 years ago

emmm....i am amateur.  I don't know how to design a 50-ohm impedance in 2 layers PCB. I just want to make a remote control for my little remote control car.

------------------ 原始邮件 ------------------ 发件人: "Cenk Keskin"<notifications@github.com>; 发送时间: 2020年3月10日(星期二) 晚上8:49 收件人: "ckflight/NRF24_TRANSCEIVER_HARDWARE"<NRF24_TRANSCEIVER_HARDWARE@noreply.github.com>; 抄送: "706545330"<706545330@qq.com>;"State change"<state_change@noreply.github.com>; 主题: Re: [ckflight/NRF24_TRANSCEIVER_HARDWARE] does it work? (#1)

It has microstrip line impedance matching for 50 ohm transmission line. I ordered my pcb from oshpark back then. With their 4 layer stack up 50 ohm microstrip line impedance is 0.34mm. There is also a cutout at the sma connector because pad is wide and it reflects the power back. Therefour sma pad is coupled to layer 3. It's rf design is fine as well.

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ckflight commented 4 years ago

Use this link to calculate trace with for 50 ohm impedance : https://www.eeweb.com/tools/microstrip-impedance Then add continuous ground layer under rf trace. Do not draw any other trace under rf traces that is mostly it. Thats all i can help for you. Please search for other things in electronicstackexchange type of forums.