Properties of quarter wave transformer: 1. Impedance transfomation: it provides impedance transformation upto the highest frequencies and is compatible with transmission line. 2. Impedance inversion: if ZL is inductive then ZS iwill be capacitive and if ZL is capacitive then ZS will be inductive it is known as impedance inversion. 3. Frequency dependent: quarter wave transformer has a length of λ/4 at only one frequency and hence it is highly frequency dependent. 4. quarter wave transformer act as step down or step up transformer,depending on whether ZL IS greater than or less than ZO.