The development and application of the fifth generation mobile communication system (5G) requires and provides high-speed and high-capacity wireless communication services. This paper describes the design of small antennas using microstrip technology as a wireless communication device operating at a frequency of 28 GHz. The technique method used for antenna design is inset feed technique with a shift to the length of the transmission line on the side of the patch gap. Antenna design is used method of moment or simulation using CST software application. To support antenna design in the simulation process using the type of material substrates used was Taconic TLY-5 type. The results of simulations the obtained, such as: bandwidth of return loss ≤ -10 dB is 454 MHz, VSWR (2:1) is 1.03, beam width is 74.4 degrees and gain is 6.72dB. An antenna design obtained through simulation shows a simple and compact antenna shape with the expected parameter value. The design is a basic element of research for antenna sub arrays for increasing radiation power.

The design of the dual-band Yagi antenna was developed to support voice communication through voice repeaters on microsatellites in the UHF-VHV frequency from ground stations. The Yagi antenna is a type of half lambda dipole antenna that makes it easy to obtain direction and increase gain. The antenna is designed using the method of moment through a simulation with the CST microwave studio software application. The design used as an antenna element material is a type of copper pipe cylinder. The results of the Yagi antenna design in the VHF frequency consist of one driven element, one reflector element, and three director elements, while the UHF frequency consists of one reflector element and seven directors. The results of simulation parameters are obtained, such as Bandwidth of return loss below 10 dB is 4.3 MHz(VHF), and 44 MHz (UHF), VSWR (2:1) is 1.24 (VHF) and 1.36 (UHF), Gain is 9.19 dBi (VHF) and 10.5 dBi (UHF) and Beam Width is 64 degree (VHF) and 58 degree (UHF). The suitability of the antenna design target is dual-band, and Gain value in UHF is higher than VHF.

Pengembangan dan aplikasi teknologi 5G untuk system komunikasi seluler mendorong guna memperoleh layanan kecepatan dan kapasitas data tinggi. Sebuah rancangan antena mikrostrip, dimana patch persegi panjang menggunakan teknik inset feed beroperasi di frekuensi 28 GHz. Antena dirancang melalui metode simulasi dengan bantuan piranti lunak CST. Material substrat antena menggunakan jenis Taconic TLY-5. Hasil simulasi diperoleh parameter, seperti: Bandwidth ? 10 dB adalah 454 MHz, VSWR (1:2) adalah 1.03, beam width adalah 74.4 derajat dan Gain adalah 6.72 dBi. Bentuk konfigurasi rancangan antena mikrostrip dengan dimensi patch adalah 3,57 mm × 4,26 mm. Sebuah rancangan antena dengan ukuran minimalis dan kompak. Kata Kunci: Antena planar, Mikrostrip, Patch persegi panjang, Inset Feed, Teknologi 5G