Miniaturized antenna integrated receiving front-end

An antenna integrated receiving front-end is presented in this work. The antenna is miniaturized from its natural operating frequency of 3.2 GHz (0.08λ₀²) to 1.85 GHz (0.03λ₀²) which is more than 60% of size reduction. The high selectivity nature of the miniaturized antenna is utilized in receiving front-end design to achieve out-of-band attenuation more than 20 dB which is highly desirable. Moreover, the low noise amplifier (LNA) is designed for noise matching considering the antenna impedance characteristics which ensures optimum noise performance of the overall system. The in-band noise figure and small signal transducer gain of the system is less than 2 dB and more than 10 dB, respectively. The output power and third- order output intercept point (OIP₃) of the receiving front-end are found to be more than 20 dBm and 30 dBm, respectively. Such compact radio frequency (RF) front-end with multiple functions like antenna miniaturization, filtering and noise matching is highly appreciated.