Tiwari N, Rao TR. A Switched Beam Antenna Array with Butler Matrix Network using Substrate Integrated Waveguide Technology for 60 GHz Radio. ACES Journal [Internet]. 2021 Aug. 18 [cited 2024 May 21];31(05):599-602. Available from: https://journals.riverpublishers.com/index.php/ACES/article/view/10133