Compact BandStop Filter Utilizing Low Cost Solution Cast Nanomagnetic Thin Films

Compact patch antenna on thick (>800 μm) NiFe 2 O 4 magnetic film

“…In our recent work, magnetic films made of various composites that were fabricated using effective and low-cost chemical methods have been characterised to exhibit high magnetisation saturation and controllable film thickness [16]. These magnetic films have been demonstrated in RF circuits and antennas to show good performance [17,18]. In this paper, we report for the first time, the 875-900-μm-thick NiFe 2 O 4 nanoparticle films, which to the best of the authors' knowledge, are the thickest magnetic films fabricated for antennas using a simple chemical fabrication method.…”

“…In this paper, we report for the first time, the 875–900‐μm‐thick NiFe 2 O 4 nanoparticle films, which to the best of the authors' knowledge, are the thickest magnetic films fabricated for antennas using a simple chemical fabrication method. The NiFe 2 O 4 film has a magnetisation saturation 4 πM s = 40.2 kG, and a line width Δ H = 850 G [17].…”

“…In authors' previous work, low-cost and effective chemical methods of fabricating thick magnetic films using various material composite nanoparticles were proposed, which were utilised to develop several Radio frequency (RF) circuits with improved performance [16][17][18]. Recently, in [18], a 30-μm MnFe 2 O 4 nanoparticle film loaded rectangular patch antenna achieves a frequency shift of 0.5 GHz, a gain enhancement of 0.5 dB and an improved bandwidth by 0.14 GHz, which is promising in antenna miniaturisation.…”

Magnetic and magnetoelectric devices for communication and energy harvesting applications

“…Harrington [56] considered the antenna loss for quality factor calculation. In [57], the authors summarized the relations between the antenna electric size and the lower limit of antenna quality factor proposed earlier in [58] and [59] for linearly and circularly polarized linear time-invariant (LTI) antennas shown in equation (1)(2)(3)(4)(5)(6) and (1-7), respectively.…”