How long can a GPS antenna cable be?
150 feet
Antenna cabling solutions typically vary depending on how far the antenna is installed from the GPS receiver. 150 feet (45 m) is the unaided cable length limit for many GPS timing receivers. Adding a GPS inline amplifier extends the cable length an additional 150 feet (45 m).
What is 50 ohm cable used for?
So 50 ohm cables are intended to be used to carry power and voltage, like the output of a transmitter. If you have a small signal, like video, or receive antenna signals, the graph above shows that the lowest loss or attenuation is 75 ohms.
How to design a 50 ohm feed line for a patch antenna?
You can use a lambda/4 transformer, but it will be a very thin trace in your design. The better way is to move the feedpoint to the middle of the antenna. You can simulate it very easy with an EM simulator like ADS or Ensemble. My apologies.
When to use 50 ohm or 75 ohm cable?
The special case where the feed line is a multiple of a half wavelength can be used to advantage when the antenna and feed line are of different impedances. The impedance of the far end will be reflected on the near end. Thus our 50 ohm antenna at the other end of the 75 ohm will appear as 50 ohms to the transmitter.
Can a 50 ohm antenna cover 75 ohms?
Thus our 50 ohm antenna at the other end of the 75 ohm will appear as 50 ohms to the transmitter. This will only happen on one frequency, but will be close enough to cover most of a ham band. To start out, lay out your coax to the proposed length but make it longer than it needs to be to reach your destination.
What is the input impedance of a 50 ohm antenna?
50 Ohm is input impedance of feedline to the antenna. In general practice, we connect an antenna with 50 Ohm connector ( like SMA, Coax…) so feedline impedance should be also 50 Ohm. For Bluetooth antenna design at 2.4 GHz, you can also refer https://anilkrpandey.wordpress.com/2017/01/19/inverted-f-bluetooth-antenna-design-for-smart-phone/