A multiband planar monopole antenna for mobile communication applications

Abstract

the equivalent T-shaped line. Here, the equivalent T-shaped line works like a bandstop filter at the second harmonic frequency. Therefore, the proposed BPF has better characteristic with the second harmonic rejection than the earlier one. These BPFs show insertion losses of 1.2 and 0.75 dB and return losses of 17.8 and 18.2 dB at the central frequency of 10 GHz and bandwidth of 18%, respectively. The characteristic of the second harmonic rejection for the compact BPF with T-shaped line is 21.5 dB at 17.3 GHz. The new BPFs can be fabricated with microelectro mechanical systems, nanoelectro mechanical systems, and hybrid microwave integrated circuits or the MMIC technique due to its entirely planar structure. ACKNOWLEDGMENTS

A CPW FED planar monopole antenna with modified H shaped slot for WLAN/Wi‐MAX application

“…These IPDs can serve as whole functional blocks, such as filters, impedance matching, balun/transformers, couplers, etc [1,2]. IPDs containing passive circuit components, such as resistors, inductors, and capacitors, are totally integrated and mounted onto a semiconducting substrate [3][4][5]. The use of IPDs transforms circuits using resistor-inductor-capacitor (RLC) chips into integrated…”

“…A branched monopole antenna with reduced ground plane is reported in [3] and a spiral type dual band antenna is presented in [4]. Multiband planar monopole antenna consisting of meandered and rectangular slot [5] and meandered structure with L‐shaped slotted ground plane [6] are reported for wireless applications. Attempt has been made in [7] to enhance the bandwidth of monopole antenna in WLAN and Wi‐MAX regime using a concavity sleeve embedded in ground plane with a pair of L‐shaped slot on patch.…”