研究目的
To design an electronically mode reconfigurable antenna, which can generate five OAM modes, namely l = 0, ±1, and ±2. The mode reconfigurable function is realized by controlling the coding sequence of the corresponding PIN diode DC bias voltage on the RFN.
研究成果
The proposed antenna can generate multiple OAM modes and has electrically controlled mode reconfigurable function by designing a RFN using multiple PIN diodes as a reconfigurable switch. The measurement results prove that the proposed design method is feasible.
研究不足
The OAM generated bandwidth is smaller than the ?10dB reflection coefficient bandwidth due to the limitation of the phase shift bandwidth of the RFN.
1：Experimental Design and Method Selection:
The antenna is based on a reconfigurable feed network (RFN) consisting of multiple PIN diodes as reconfigurable switches, a direct current (dc) control board and a 2 × 4 radial uniform circular array.
2：Sample Selection and Data Sources:
The prototype of the proposed antenna is simulated and fabricated to validate the proposed design.
3：List of Experimental Equipment and Materials:
PIN diodes MA4PBL027 with Beam Lead Die package from MACOM are used as the reconfigurable switch.
4：Experimental Procedures and Operational Workflow:
By controlling the coding sequence of the corresponding PIN diode dc bias voltage on the RFN using a programmable microcontroller, the OAM modes generated by the proposed antenna can be dynamically reconfigured.
5：Data Analysis Methods:
Both far-field and near-field experiments were performed to verify the feasibility of the proposed design.
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