We present a high-resolution radio study of the supernova remnant ( SNR ) G11.2 - 0.3 using archival VLA data .
Spectral tomography is performed to determine the properties of this composite-type SNR ’ s individual components , which have only recently been distinguished through X-ray observations .
Our results indicate that the spectral index of the pulsar wind nebula ( PWN ) , or plerion , is \alpha _ { P } = 0.25 ^ { +0.05 } _ { -0.10 } .
We observe a spectral index of \alpha _ { S } = 0.56 \pm 0.02 throughout most of the SNR shell region , but also detect a gradient in \alpha in the south-eastern component .
We compare the spectral index and flux density with recent single-dish radio data of the source .
Also , the radio efficiency and morphological properties of this PWN are found to be consistent with results for other known PWN systems .