On behalf of the APMC 2013 Organizing Committee, I would like to welcome you to the 2013 Asia-Pacific Microwave Conference. As the general chair of the conference, it is my great pleasure and honor to invite you to the APMC 2013 in Coex, Seoul, Korea, on November 5 ~ 8, 2013. The APMC 2013 will offer opportunities to share the most up-to-date scientific discoveries and innovative products. The ultimate objective is to advance our field of microwave through networking among academia, industries, and all affiliated specialists and building mutual understanding among colleagues from all over the world. The scientific programs will provide all participants with opportunities to exchange the latest information, ideas, and experiences on microwave fields. Your important contributions of papers and presentations as well as active participation in workshops will make the events even more fruitful. Invaluable instructional lectures, workshops, and short course statements will be offered from the outstanding microwave experts. Renowned with the long legacy of history and the reputation as one of the world’s top modern cities, you will find both the past and the future here in Seoul. I hope that you will enjoy the sightseeing of the beautiful palaces, the shopping, and the recreational activities in downtown of Seoul. I am looking forward to meeting you in Seoul on November 5 ~ 8, 2013. With your active participation and support, this conference will achieve a resounding success. I assure you that this conference will be an academically enriching, socially enjoyable, and truly memorable experience for all delegates and accompanying persons.