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1) What's the difference between omnidirectional antenna and the normal UHF antenna? What I know is there are 2types of antenna in RFID implementation; linear polarized and circular polarized. Does omnidirectional refers to circular type antenna?
2) Is the calculation for EIRP / ERP the same...
1) What I know is, the transmitting power output at the RFID reader can be adjusted to 1 Watt / 30dBm. The reader will be connected to 4 external antennas (different direction). Therefore should I use the 30dBm to calculate each antenna or should I divide 30dBm by 4 antennas which is 7.5dBM in...
I have difficulties understanding this.
Assuming the Power = 1 Watt (30dBm)
Assuming the Antenna Gain shown by the hardware specs in dBi = 5dBi
Assuming signal loss = 0
EIRP = 30dBm + 5dBi - 0 = 35dB (3.162 Watts)
ERP = 30dBm + (5dBi - 2.15) - 0 = 32.85dB (1.928 Watts)
Assuming the Power = 1...
I have a fixed reader, normally a reader can be connected to 4 antennas right? so the power will be distributed equally & should i calculate erp for each?
Transmitter Power Output : This one we normally set/configure at the reader correct? If there are 4 anttenas connected to the reader, and let say I set to "A" power output, does it mean "A" power will go to each reader or it will be distributed equally? And the EIRP is the calculation for all...
Okay pls correct me..
EIRP = Transmitter power output (dBm) + Antenna Gain (dBi) - Line Loss (dB)
EIRP
Measured in dBm (decibles in miliwatts) / Watts
Antnnea Gain
Measured in dBi (decibels referenced to an isotropic antenna)
How to know / calculate this?
Cable Loss
Measured in dB...
Hi,
I'm a project manager for one RFID company, I have been reading alot about the technical part for my own understanding but I still couldnt understand some / most part of it. Appreciate if you guys can help me with some questions, I'm a beginner.. so please use simple english when explaining...
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