With rapid technological advancements in modern wireless technologies, the requirement of low-profile and compact antennas that can cover various applications at the same time has increased tremendously. Metamaterials (MTMs) have paved their way in the direction of size reduction of planar antennas because they support zeroth-order/infinite wavelength propagation. However, it is seen that the MTM antennas exhibit very low or sometimes negative gain at zeroth-order resonance. In this chapter, three ultraminiaturized CPW-fed antennas inspired by the left-handed transmission line approach are presented to circumvent the above issue. The study presented in this chapter suggests that the surface waves are suppressed significantly when complementary closed-ring resonators (CCRRs) are embedded in coplanar waveguide ground, leading to gain enhancement at a particular frequency. Moreover, the key advantage of this technique lies in the fact that it does not alter the original size of the antenna unlike other gain enhancement methods such as frequency selective surface reflectors, metasurface superstrate and artificial magnetic conductor, etc. Gain increments of 1.03 dBi, 2.29 dBi, and 0.98 dBi have been achieved at zeroth-order resonance frequency in Antenna-A, Antenna-B, and Antenna-C, respectively, by integrating CCRRs. Furthermore, in comparison to antenna without MTM loading, a miniaturization of 56.33%, 18.88%, and 50.48% has been achieved in Antenna-A, Antenna-B, and Antenna-C, respectively. Owing to their low-profile and ultra-compact geometry, peculiar reflection, and far-field characteristics, these antennas are potential candidates to be deployed in S-band and C-band small-space applications.