C
ChronoFish
- Jan 1, 1970
- 0
Hi there,
From my understanding RF-Tag technology is still sketchy so maybe it's
not the best solution for my need.
What I need is a small transmitter operating at a range up to 1 meter
(greater than 2 meters is actually not desirable). I am looking for
frequencies no higher than 27 MHz as the medium the application is
operating in is water or a water/air combination.
Most of the RFICs that I have found begin their operation at 100MHz
and tend to be in the 300MHz - 450MHz range. I believe this will be
too high for my needs.
TI produces RFID chips in the 134kHz and 13MHz range and this seems
very desirable (has a range of 1 meter and has a package size of only
1mm x 32mm). What is holding me back here is the cost of the readers.
I believe part of what makes the cost so high is that the reader needs
to generate a large magnetic field to power multiple transmitters in a
relatively large area (1 meter radius?). My thought here was to
combine the RFID chip with it's own powersource. Now the power source
only needs to work in the 1 - 30 mm range, and only for a single
transmitter.
Any idea of what this power source would look like? I realize it may
double or triple the size of the RFID package - and that's okay - much
larger than that may not be. The power doesn't need to be continuous,
but I would like to be able to broadcast 2-3 times a second or so
using a quarter size battery.
Looking forward to your suggestions and feedback.
Thanks!
Christopher
From my understanding RF-Tag technology is still sketchy so maybe it's
not the best solution for my need.
What I need is a small transmitter operating at a range up to 1 meter
(greater than 2 meters is actually not desirable). I am looking for
frequencies no higher than 27 MHz as the medium the application is
operating in is water or a water/air combination.
Most of the RFICs that I have found begin their operation at 100MHz
and tend to be in the 300MHz - 450MHz range. I believe this will be
too high for my needs.
TI produces RFID chips in the 134kHz and 13MHz range and this seems
very desirable (has a range of 1 meter and has a package size of only
1mm x 32mm). What is holding me back here is the cost of the readers.
I believe part of what makes the cost so high is that the reader needs
to generate a large magnetic field to power multiple transmitters in a
relatively large area (1 meter radius?). My thought here was to
combine the RFID chip with it's own powersource. Now the power source
only needs to work in the 1 - 30 mm range, and only for a single
transmitter.
Any idea of what this power source would look like? I realize it may
double or triple the size of the RFID package - and that's okay - much
larger than that may not be. The power doesn't need to be continuous,
but I would like to be able to broadcast 2-3 times a second or so
using a quarter size battery.
Looking forward to your suggestions and feedback.
Thanks!
Christopher
