Questions tagged [phased-array]
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34 questions
1 vote
1 answer
83 views
What options do I have for a V/U 4 way 90 degree divider/combiner for satcom
I have a AV2011 satcom antenna that has a Merrimac QHF-2-.312GN power divider/combiner that's good for 225mhz to 400mhz and I'd to replace it with a wider bandwidth version buuut this series doesn't ...
0 votes
1 answer
1k views
How to Feed 2 x Co-Phased 4 Element Yagi Antennas?
I am wanting to build 2 x 4 element vertical yagi antennas for 28 MHz and co-phase them and feed with one 50 ohm coaxial transmission line. If i were to use a gamma match for each yagi and tune them ...
- 3,817
3 votes
2 answers
1k views
Why is the total radiated power of array calculated by sum of square of excitation coefficients different from the result by integral of power pattern
Consider an array with same isotropic antennas, $P_{ele}^n$ is the input power of the nth antenna. As I consider antenna radiation efficiency = 1, the $P_{ele}^n$ is also the radiated power of the nth ...
- 245
5 votes
2 answers
846 views
Phased array (rx only) with separate complete receivers
Is it possible to have a network of separate (but co-located) 'receivers' (antenna + adc) act as a phased array receiver? Supposing one can get very precise timestamping on each receiver, couldn't all ...
1 vote
1 answer
421 views
Excitation coefficient of a linear phased array
it's well known that in a linear and equispaced antenna array, the array factor is equal to: The array is then called uniform if $|I_n| = I$ is the same for all elements. The phase terms $\angle I_n$ ...
- 289
2 votes
2 answers
446 views
Destructive interference between two close antennas
let's consider this two planar biconical dipoles of total length and width each one 10mm, at a distance D = 25.6mm. They are excited with the discrete ports in the picture, which corresponds in this ...
- 289
1 vote
1 answer
167 views
Dual Rubber Ducky antennas
Can I use 2 identical rubber ducky antennas with a splitter on my CB HT radio to improve range?
- 11
1 vote
3 answers
2k views
Effective area of a phased array
For a $N$-element planar phased array, all the elements are same isotropic antennas. Then, what is the effective area of this array? Is it $$A_e=\frac{\lambda^2}{4\pi}GN$$ where $G$ is the directivity ...
- 245