A new type of monopole pin antenna array model based on an artificial magnetic conductor (AMC) structure is proposed in this paper

which will be potentially used in a wireless intra-/inter-chip (WⅡC) communication system

.The PCB substrate is FR4 with the thickness of 3mm and its square area is 50mm by 50mm.On the PCB center

the four monopole antennas for four chips are mounted at the four corners of a square with dimensions of 15mm15mm.The pin antennas are made of copper with the length of 2.6mm and the diameter of 1.5mm.A periodical AMC copper plane is embedded above the lower PCB plane.The four monopole antennas form a four-port network.Based on this WⅡC prototype simulation and prediction

its actual circuits are fabricated and measured.It is found that from the measurement the -10dB bandwidth of the return loss

S

11

ranges from 13.02GHz to 15.73GHz for this proposed antenna array.At 14.22GHz the magnitude of

S

11

reaches the minimum value of -27.25dB

and the measured

S

21

S

31

S

41

are -26.26

-19.23

and -21.14dB

respectively.In comparison to the antenna array without an AMC

the scattering parameters are improved effectively.The

S

11

is enhanced about 3.63dB and

S

21

S

31

and

S

41

increase 2.05

7.21

5.28dB

respectively.Consequently

it is demonstrated that the embedded AMC structure in the PCB dielectric can significantly improve the signal voltage transmission coefficients between monopole antennas and increase the signal power transmission gains.