Conformal Filtering Patch Antenna With Dual Independently Tunable Radiation Nulls

A conformal, compact, and flexible patch filtering antenna with independently tunable radiation nulls is presented. By etching open‐ended split‐ring resonator (SRR) slots and meandered slots on a conformal microstrip patch, two independently controllable radiation nulls are introduced to enhance band‐edge selectivity. The antenna is implemented on a flexible substrate, maintaining stable filtering performance and radiation null controllability under conformal conditions. The prototype is designed to operate at 2.37 GHz and conforms to a cylindrical surface with a radius of 70 mm. Two radiation nulls are achieved at 2.10 GHz and 2.47 GHz, respectively. The antenna exhibits an average in‐band gain of over 7.1 dBi and out‐of‐band suppression exceeding 20.5 dB. The proposed design is particularly suitable for conformal antenna systems in smart helmets and unmanned aerial vehicles (UAVs)/robotic platforms, where low‐profile integration onto curved surfaces and enhanced interference rejection are essential.