![]() ![]() The output RF signal is amplified to approach 33dBm output power to the antenna port via QORVO chip that operates in the range from 700MHz to 2700MHz. The transceiver system is based on the analog devices chip AD9361 controlled by zynq-7000 FPGA. The two filters have high roll off and narrow fractional bandwidth within a compact area. The second component is the filters that separate the transmitter from the receiver. This configuration keeps the communication between the CubeSat and the ground station to facilitate the de-tumbling process of the CubeSat. The transmitter/receiver antennas are operating in the downlink /uplink at frequency bands from 2.2 GHz to 2.29 GHz and from 2.025 GHz to 2.11 GHz, respectively. Each board has two antennas transmitter and receiver antennas. In this paper, two antenna boards are designed one board faces the earth and the other board lies on the opposite side. The passive components are designed, fabricated and measured while the active components are based on commercial components. It consists of passive components such as the antennas and the filters and other active components. The system should be developed with reliable and compact hardware and flexible and efficient software. ![]() Our goal is to build and test our own S-band communication subsystem for CubeSat. From these points of view, space-tested technologies were preferred to mitigate the risk of failure. Its development takes a long time, high cost, and has a large risk of failure, and does not allow for testing new technologies to avoid the mission’s failure. In the past decade, the majority of the launched satellites have a weight exceeds 1 Ton. Direct Broadcast Service (DBS) and Fixed Satellite Service (FSS) in transmit mode respectively employ the frequency band 11.41-12.92GHz and 14-14.5GHz. The proposed wideband BPF satisfies the International Telecommunication Union ((ITU) region 3 spectrum requirements. The desired microstrip triple-band BPF operates at the Ku band, resonates at 10.28GHz, 12GHz, and 14.62GHz, while the simulated and experimental results are almost identical. The equivalent LC circuit of the DGS and hairpin structure is obtained with the Ansys electronic desktop and by using simple circuit analysis. The proposed filter offers a compact size with low return loss. The space between two consecutive hairpin resonators has different distances d1 and d2 with values of 0.2mm and 0.4mm respectively. A Rogers (RT5880) material with εr = 2.2 and thickness of 1.27mm was used to fabricate the proposed structure. In this study, a three-pole hairpin structure was fabricated on the top of the substrate material and an open loop microstrip structure at the ground to give a modified triple-band BPF with a unique design. ![]()
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