Very rushed initial interview with HR. They did not have any questions prepared and made up questions as they went. Then had a 1 on 1 technical interview with the lead RF engineer. They did not ask any questions about fundamental RF principles like impedance matching or S-parameters. Asked a very general question to tell them about myself and my projects. Then came up with questions based on the components I mentioned. It seemed both interviewers were winging it and coming up with questions on the fly.