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41 Threads found on edaboard.com: 433 Antenna
the output voltage of the antenna is dependent on the combination of the power of the received signal, the bandwidth of the antenna and the impedance of the load connected to it. Assuming that the load impedance is constant, it can be deducted that the power of the received signal can then be correlated to the output
Hi every one, I want to use a 433 Mhz RF remote control for my electronic board which is working with micro controller and its reciever is also 433 Mhz, I want to increase the range of this device(I mean fore example from 10 meter to 20 meter) I have no information about the material and shape of the antenna. the picture of the device which (...)
Hello Please I want to know how we choose the correct output power of the vector network anaalyzer (VNA) for the tuning (matching) of an ISM 433 MHz antenna and gps antenna?? Thank you
First of all I would redesign the low-pass. Presently it's shorting the transmitter at 144/433 MHz.
Hi, I am trying to design a RF transmitter using the saw resonator for 433 Mhz. I have got it to work but at a very small distance. I am trying to make it work for around 50-60 meters. My circuit is similar to the attachment, but values are somewhat different. R1 : 50 K , no R2, L2 . C3: 5pF, C4: 18pF. I want to increase the transmitting
TI has some application notes about integrated 433 MHz antennas:
Primarily I prefer the finished modules and there is a design, given the antenna manufacturer in the PRC. When you hit the antenna. Can you advise some antennas with higher gain at 433/868 MHz Alternatively, these bands are available directional antenna? Again, check your system parameters. To extend (...)
ism bands: 6.780 MHz 13.560 MHz 27.120 MHz 40.680 MHz 433.920 MHz 915.000 MHz 2.450 GHz 5.800 GHz 24.125 GHz
i am using 433.92mhz transmitter.selecting antenna is my problem.how to calculate length,thickness etc.please guide me
I have designed a small transmitter (and receiver) that will use a Microchip MRF49XA transceiver chip. I have layed out both boards but on the transmitter board (remote control) I am having trouble selecting an antenna. The board is very compact as you can see in the picture below. I was planning on using a piece of wire for antenna but realized it
check the following URL for 1-antenna 433 Mbit/s for 4-antenna 867 Mbit/s how this comes !!!
I have a pair of 433mhz Rx Tx Module in my wireless RS232 interface. Right now I have connected separate antenna for both Rx and Tx. Is it possible to use one single antenna for both Rx and Tx? 76221 Thanks Subare
Hello edaboarders, I'm trying to tune a pcb loop-antenna for a remote control working @ 433.92 Mhz. I didn't design the rf module i buyed it on ebay but it needs external antenna design. I copied the antenna filter topology from an old remote control and it looks like the one shown in the attached drawing; modifing the (...)
The communication range of RF depends on frequency, Tx power, Rx sensitivity, Transmission line loss, antenna gain/loss, and directional or antenna beam. So, first try to increase your antenna gain and make it directional on both Tx and Rx. If it is not enough range, you can make a repeater by using your exixting Rx and a pair of new (...)
An RF module consists of an helical antenna (with 12 to 14 turns) for receiving signal. ( RF module wid 433.9 Mz frequency and decoder IC-SC2272 on it.) what will happen if the turns of helical antenna are reduced into a straight line wire? will it receive any signal after making it straight? or it will not work at all?
Hi everyone, im trying to design a dipole antenna at 433 Mhz in CST divided into sections that depends on the current. so can anyone help me to calculate the current in the dipole antenna thanks
i am doing project on PCB yagi antenna.What are the components used for 433 mHz to receive any channel in Tv. and another question is what are channel available in the 433 mHz?
Legal 433 MHz applications are low power compared to GSM, also standard GSM equipment can be expected to implement a high EMC standard. In so far, a possible problem is most likely in the GSM -> 433 MHz direction. The main factor is receiver preselection, to prevent e.g. overload of the input stage. Simple 433 MHz circuits don't neccessarily (...)
Hi people, I am trying to send a '1' from 434 tx to 434 rx so that the led connected in the receiver led glows.. the transmitter has got 4 pins namely antenna,vcc,gnd and data...i connected a small wire in the antenna pin...and for data i connected the txd pin of at89s52 with data pin of transmitter..the receiver consists of 8 whi
I'm trying to understand why the RF remote control system of a major consumer product performs poorly, and how to improve it. The receiver antenna design is unlike anything I have ever seen, and defies my understanding. If you have a strong technical background including antenna theory and enjoy a challenge, contact me by PM for details of the pr