Design of a single chip antenna combined with coplanar matching circuit and duplexer

We designed the on-chip antenna combined with coplanar waveguide (CPW) broadband impedance matching circuit and duplexers with BPFs. Firstly, we designed a slot antenna with a radiation resistance matched to a three-pole bandpass filter (BPF) with 10.5GHz center frequency and 8% fractional bandwidth. Next, in order to obtain the high isolation from transmitter (T_x) to receiver (R_x), we attached the phase control line, which can be used as impedance matching, in front of each BPF in a duplexer. Finally, we design the T_x-and R_x-BPF matched to the input impedance of the antenna and phase control line. In the duplexer, R_x 2-pole BPF has center frequency=10.3GHz and bandwidth=40MHz, and T_x BPF has center frequency=10.7GHz and bandwidth=40MHz.