Nowadays with the limited spectrum bands the mobile operators have been challengedrnto deliver multimedia applications with higher data rates, low latency and better qualityrnof service of mobile communications to a growing number of users. This has led to a bigrnnumber of inventions and technology advancement in past decades which is the prime goalsrnof the upcoming 5th generation (5G) mobile networks. The millimeter wave (mmWave) isrna suitable candidate for 5G with its high frequency range from 30 GHz up to 300 GHz.rnThis thesis aims to design, analyze, simulate and compare the single and array elementsrnof printed dipole, microstrip patch and planar inverted-F (PIFA) antennas regarding torntheir performances at the same operating frequency of 28 GHz using computer simulatedrntechnology (CST) microwave studio electromagnetic simulator. The comparison is based onrnsimulated results of radiation pattern, gain, directivity, VSWR, return loss and e ciency.rnBased on the results obtained 4 1 array antennas have maximum gain and directivityrnof 9.87 dBi and 10.12 dBi for printed dipole antenna, 12.09 dBi and 12.37 dBi for microstriprnpatch antenna, and 9.79 dBi and 9.812 dBi for PIFA, respectively. The VSWR and returnrnloss value, respectively, is found to be 2.4 and -7.57 dB for printed dipole array antenna, 1.09rnand -27.37 dB for microstrip patch array antenna, and 2.6 and -6.5 dB for array of PIFA.rnThe radiation e ciency for printed dipole array antenna is -0.248, for microstrip patchrnarray antenna is -0.275, and for array of PIFA is -0.18. In this regard, the analysis showsrnthat the microstrip patch antenna is quite capable of achieving the highest performancesrnand represent an obvious choice for mobile applications. Moreover, to achieve an optimumrndesign parameter the microstrip patch array antenna is also simulated with varying valuesrnof the substrate height, substrate thickness, patch length and patch width. The e ect ofrnthese parameters on antenna performance is analyzed.