This paper describes the broadband monopole antenna refers to a signal wideband of the frequencies, which can be divided the signal into channels of the frequency bins. Aim this paper to design and development broadband monopole antenna. The monopole antenna was designed by adding slot to the radiated patch antenna with a single feed line, which reduced the size and the design complexity. A rectangular patch antenna was presented using feed line to decrease the ground plane with a suitable gap distance. The broadband monopole antenna was designed with a frequency range of 800 MHz -3 GHz, with Bandwidth 0.66 (dB), reflection coefficients and return loss. The frequency-dependent characteristic impedance was included. It can be used in various broadband applications in used commercially for various communication systems such as 4G (LTE), WiMAX and WLAN (LTE), remote sensing, biomedical, and mobile wireless. Apart from that, this technology is environment-friendly; an antenna which consists of reception and transmission. The antenna is simulated by using computer simulation (CST) software; using FR-4 substrate of 4.4 permittivity thickness 1.6 mm and loss tangent of 0.025. The measurement result is accepted with simulation result, proving the acceptable broadband operation for this proposed structure.

A new family of substrate integrated waveguide SIW-metamaterial bandpass filters is proposed which support backward and forward wave propagations with two adjacent passbands under the cutoff frequency of the conventional SIW structure. Through varying the fractal slots sizes etched over SIW structures, different frequency transmission responses were realized. Extraction of the metamaterial parameters was achieved via scattering parameters. The equivalent electrical length of a fractal slot is larger than the conventional slot, making it suitable to design highly miniaturized filters. The equivalent circuit model was analyzed in detail to provide comprehension on the SIW-metamaterial unit cells. Three filters using the 3rd iteration H-shaped SIW-metamaterial unit cells were designed and tested using subwavelength resonators. Filter design was used to extract the coupling coefficient and external quality factor to obtain the filters' optimized physical dimensions. The out-of-band rejection can be enhanced by reconfiguring the fractal slots or the SIW. A wide upper out-of-band rejection with attenuation > 30 dB with the range 5.5 GHz to 8 GHz was realized. The proposed filters offer advantages through low insertion loss, easy fabrication, high selectivity, small size, and low cost. The measured scattering parameters S 21 and S 11 were in good agreement with the simulated ones.

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