Dipole filtering antenna with quasi‐elliptic peak gain response using parasitic elements

Abstract

A dipole filtering antenna with a quasi-elliptic peak gain frequency response is proposed. It consists of a driven dipole, a parasitic resonator and a parasitic meandered resonator with the same resonant length. By introducing these two parasitic elements, the proposed antenna has two reflection zeros in the passband and two radiation nulls in the stopbands. An antenna prototype centering at 1.85 GHz is fabricated. Measured peak gain and radiation efficiency achieve minimum values of −7.95 dBi and 4.23% at 1.73 GHz and −4.17 dBi and 7.78% at 1.92 GHz, respectively. The roll-off factor of peak gain is 182.52 dB/GHz at the lower sideband and 281.27 dB/GHz at the upper sideband, respectively. Measured results verify the effectiveness of the proposed design. Compared to conventional dipole antennas, the proposed antenna achieves widen impedance bandwidth as well as filtering frequency performance such as flat passband gain, steep sideband selectivity and high stopband suppression. K E Y W O R D S antenna gain, dipole antenna, filtering antenna, parasitic element, quasielliptic response

A single‐layer filtering patch antenna array with simple differential feeding network

“…As shown, the profile is higher because of multilayer structure 8 and common‐mode rejection cannot be exhibited 9 . Although the profile is low, the peak gain is reduced by the introduction of filter 14,16 . The proposed antenna has an array structure, differential feeding, and common‐mode rejection.…”

“…Various resonators are also integrated to the feeding structure for filtering response, 5‐10 such as stub loaded resonator, 5,6 multimode resonator, 7 step impedance resonator, 8 and hairpin resonator 9,10 . Different from the above articles, shorting pins, 13,14 slots 15 and parasitic elements 16 are also introduced to achieve filtering function.…”

A Survey on Reconfigurable Microstrip Filter–Antenna Integration: Recent Developments and Challenges

“…Recently many microstrip filter-antenna designs using different types of substrate materials have been proposed [53][54][55][56][57][58][59][60][61][62][63][64][65][66][67][68][69][70][71]. In [56], a co-design of a filter-antenna using a multilayered substrate is introduced for future wireless applications.…”

“…In [58], a dipole microstrip filter-antenna with quasi-elliptic gain performance using parasitic resonators is presented. The parasitic elements were designed based on the stepped-impedance resonators and utilized to generate two transmission zeros in the in-band transmission, as well as two radiation nulls in the out-of-band bandwidth.…”

“…As explained in the literature, many design approaches have been carried out to offer a simple structure and compact size, which can be easily integrated with other RF front end systems. The multilayer structures presented in [56,58,59,62] have not managed these requirements. Moreover, substrate integrated waveguide (SIW) technology and the balun configuration were other notable attempts, as presented in [57] and [61], respectively.…”