Power amplifier nonlinearity introduces intermodulation distortion when transmitting dual-tone signals from an antenna array. To reduce distortion levels and increase output power for dual-tone systems we propose to densely interleave two antenna arrays without increasing the antenna aperture. Each array is excited with a different tone, resulting in a single-tone input for the power amplifiers, thereby reducing intermodulation distortion. In order to compare the performance of the densely interleaved array with a regular, planar array, when excited by two-tone signals, a procedure for evaluating the S-parameters matrix of an interleaved dipole array is presented. Simulations with a realistic RF power amplifier model show 13 to 31 dB intermodulation reduction for the same output power and total antenna aperture.
|Title of host publication||2019 IEEE International Symposium on Phased Array Systems and Technology|
|Place of Publication||Piscataway, NJ|
|Publication status||Published - 16 Oct 2019|
|Event||2019 IEEE International Symposium on Phased Array Systems and Technology - Waltham, United States|
Duration: 15 Oct 2019 → 18 Oct 2019
|Conference||2019 IEEE International Symposium on Phased Array Systems and Technology|
|Period||15/10/19 → 18/10/19|
- Phased arrays
- Mutual coupling
- Interleaved arrays
Atanasov, A., Oude Alink, M. S., & van Vliet, F. E. (2019). Densely Interleaved Arrays for Dual-Tone Transmitters. In 2019 IEEE International Symposium on Phased Array Systems and Technology Piscataway, NJ: IEEE.