TY - JOUR
T1 - Axial Cross Polarization in Reflector Antennas with Surface Errors of Large Correlation Diameter
AU - Jervase, Joseph A.
AU - Ghobrial, Samir I.
PY - 1983/7
Y1 - 1983/7
N2 - Equations for boresight cross polarization and isolation of axisymmetric and offset antennas in the presence of surface errors are derived in terms of numerically computable integrals. Computations revealed that 1) for root mean square (rms) error <λ/4 cross polarization increases monotonically with increasing rms error; and 2) maximum cross polarization occurs when the correlation diameter is 0.5 D for axisymmetric antennas (0.8 D for offset antennas). For rms error >λ/4 boresight cross polarization remains almost constant. Furthermore, results revealed that for given correlation diameter and rms error, axisymmetric antennas offer better boresight isolation in comparison with offset antennas having the same polarization efficiency.
AB - Equations for boresight cross polarization and isolation of axisymmetric and offset antennas in the presence of surface errors are derived in terms of numerically computable integrals. Computations revealed that 1) for root mean square (rms) error <λ/4 cross polarization increases monotonically with increasing rms error; and 2) maximum cross polarization occurs when the correlation diameter is 0.5 D for axisymmetric antennas (0.8 D for offset antennas). For rms error >λ/4 boresight cross polarization remains almost constant. Furthermore, results revealed that for given correlation diameter and rms error, axisymmetric antennas offer better boresight isolation in comparison with offset antennas having the same polarization efficiency.
UR - http://www.scopus.com/inward/record.url?scp=0020778122&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0020778122&partnerID=8YFLogxK
U2 - 10.1109/TAP.1983.1143107
DO - 10.1109/TAP.1983.1143107
M3 - Article
AN - SCOPUS:0020778122
SN - 0018-926X
VL - 31
SP - 662
EP - 665
JO - IEEE Transactions on Antennas and Propagation
JF - IEEE Transactions on Antennas and Propagation
IS - 4
ER -