Contact your university’s disability services office. They can negotiate with Wiley for a legally accessible copy of the instructor’s manual on your behalf.
In the academic world of electrical engineering, few textbooks command as much respect as Antenna Theory: Analysis and Design by Constantine A. Balanis. Often called the "bible of antenna engineering," the third edition (published by Wiley) remains a staple for graduate and advanced undergraduate courses worldwide. Alongside the textbook exists a shadow digital artifact: a file known as the . balanis solution manual antenna theory 3rd edition.iso
For antenna theory practice without piracy, consider: Contact your university’s disability services office