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Results tagged with antenna
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user 2148
Antenna (radio), also known as an aerial, a transducer designed to transmit or receive electromagnetic (e.g. TV or radio) waves. -Wikipedia
2
votes
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Dipole antenna length calculation -- why so much variation?
so at 100 MHz, Calculator one yields a dipole antenna length of 4.68 feet, while calculator two give a length of 4.6822 feet. How closely do you expect them to match? …
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Can I merge two impedance matching circuits?
On the Antenna side, looking into that 2.2pF cap you should see 50 Ohm. On the transmitter side, you should see 50 Ohms looking in to the node between C5 and C6. … I'd do some tweaking at the antenna range to make sure you got the range you really wanted, though. …
- 1,906
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Prototyping an antenna array receiver
1- an RF Receiver is what you want to sit between the Antenna and ADC. Something like the Lime LM6002 or the AD9361 transceiver IC's might make this a lot easier. …
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Antenna matching network. What? Why? How?
You may lose some range, but the fact that you're using a chip antenna is probably more significant. …
- 1,906
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Good inductor parameter for GHz frequency matching chosing
Do you understand what SRF is? If you understand that, then you can calculate the parasitic capacitance of the inductor. Before you jump into selecting inductors, make sure you know what that is.
As …
- 1,906
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Long distance fishing fleet telemetry
You might also want to take a look at Meteor burst communications, bouncing VHF off ionized meteor trails. It's apparently pretty reliable.
https://en.wikipedia.org/wiki/Meteor_burst_communications
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Friis Transmission Equation for Wideband Transmission
However, consider the following issues
The Transmit Antenna gain will vary in both frequency and directionality, so you need to factor in the exact vector direction to the receive antenna. … Same for the Receive Antenna.
The input impedance of your antenna will vary across the infinite bandwidth you're proposing, which will effect the antenna gain, so that will have to be factored in. …
- 1,906
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Can you recommend a good schematic or module of a Bluetooth + Wi-Fi combo?
For high volume stuff like cellphones and tablets, Wifi and Bluetooth are about 2 square millimeters on the main SOC. See, for example Qualcomm's Snapdragon 600 marketing information http://www.qualco …
- 1,906
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Will an impedance matching network also act as a filter?
They can act as a filter in the sense that the matching network will have a inherent frequency response out of band. This performance is definitely secondary to the impedance matching functionality.
…
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GPS antenna reference design
If you antenna has a DC short, then you'll effectively short out the LNA on the input. On the Output, SAW filters can be sensitive to a DC Bias, so a DC Block could help that last longer. … The GNSS chip may be able to feed +3V out of the RF port to power a remote antenna, which could cause problems with your SAW. …
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