Abstract
Accurate control of complex excitation of array
elements is key to ensure spatial discrimination capability of
millimeter-wave (mmWave) phased array, e.g. beamforming to
target signal directions and nulling towards interference signal
directions. Element excitation uncertainties are typically evaluated
in an “on-off” mode, where the element under test is
enabled with other phased array elements properly terminated.
However, such an “on-off” method might lead to inaccurate
results due to the fact that mmWave phased arrays are typically
designed for an “all-on” mode, where all array elements are
enabled with proper complex excitations. Therefore, there is
a need to accurately determine the array element excitation
uncertainties in its typical operation mode, i.e. “all-on” mode.
In this letter, an “all-on” method is proposed to enable accurate
array element uncertainty investigation in the “all-on” mode.
The proposed algorithm is experimentally validated in a 44
mmWave phased-array experimental platform. The experimental
results have shown that an amplitude deviation up to 0.1 dB
and a phase deviation 1 can be achieved in the “all-on” mode
with the proposed method, compared to those up to 0.8 dB and
9, respectively for the conventional “on-off” method.
elements is key to ensure spatial discrimination capability of
millimeter-wave (mmWave) phased array, e.g. beamforming to
target signal directions and nulling towards interference signal
directions. Element excitation uncertainties are typically evaluated
in an “on-off” mode, where the element under test is
enabled with other phased array elements properly terminated.
However, such an “on-off” method might lead to inaccurate
results due to the fact that mmWave phased arrays are typically
designed for an “all-on” mode, where all array elements are
enabled with proper complex excitations. Therefore, there is
a need to accurately determine the array element excitation
uncertainties in its typical operation mode, i.e. “all-on” mode.
In this letter, an “all-on” method is proposed to enable accurate
array element uncertainty investigation in the “all-on” mode.
The proposed algorithm is experimentally validated in a 44
mmWave phased-array experimental platform. The experimental
results have shown that an amplitude deviation up to 0.1 dB
and a phase deviation 1 can be achieved in the “all-on” mode
with the proposed method, compared to those up to 0.8 dB and
9, respectively for the conventional “on-off” method.
| Original language | English |
|---|---|
| Article number | 9076335 |
| Journal | I E E E Antennas and Wireless Propagation Letters |
| Volume | 19 |
| Issue number | 11 |
| Pages (from-to) | 1993-1997 |
| Number of pages | 5 |
| ISSN | 1536-1225 |
| DOIs | |
| Publication status | Published - Nov 2020 |
Keywords
- Antenna measurement
- millimeter-wave (mmWave) antenna-in-package (AiP)
- phased array calibration
- uncertainty analysis