She has coauthored more than 200 journal and international conference contributions in the areas of antennas and THz systems. Dr. Llombart was the recipient H. A. Wheeler Award for the Best Applications Paper of 2008 in the IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, the 2014 THz Science and Technology Best Paper Award of the IEEE Microwave Theory and Techniques Society, and several NASA awards. She was also the recipient of the 2014 IEEE Antenna and Propagation Society Lot Shafai Mid-Career Distinguished Achievement Award. She serves as a Board member of the IRMMW-THz International Society and Associated Editor of IEEE Transaction on Antennas and Propagation. In 2015, she was the recipient of European Research Council Starting Grant. In 2019, she became IEEE fellow for contributions to millimeter and submillimeter wave quasi-optical antennas.