This paper presents a comprehensive technical review on compact microstrip filtering antennas and their recent advancements for wireless communication, IoT, 5G, and ultra-wideband (UWB) applications. Filtering antennas, which integrate filtering functions directly into the radiating structure, have gained significant attention for their compactness, improved out-of-band suppression, and enhanced selectivity. The paper explores various design techniques including multimode resonators, dielectric resonator antennas Substrate Integrated Waveguide structures, cavity-backed configurations, and metallic via. Special focus is given to reconfigurable filtering antennas, where dynamic tunable and frequency band notching improve the versatility and performance in real-time environments. Integrating innovative feeding structures, coplanar electromagnetic band gap (EBG) resonators, and wideband filtering properties ensures high gain, minimized mutual coupling, and efficient spectrum utilization. Comparative analyses highlight the advantages of different filtering antenna concepts regarding bandwidth, polarization, and scalability, with applications ranging from IoT to millimeter-wave 5G, 6G systems. The challenges in manufacturing, scalability, and real-world implementation of these antennas are also discussed.