Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a transmitting device may determine a set of filler tones based at least in part on a set of signals intended for a set of Internet of Things (IoT) devices. The set of filler tones may be determined to maintain a peak energy, an average power, a peak-to-average power ratio, or a combination thereof. The transmitting device may transmit, in a first time period and using a first antenna group, the set of signals in combination with the set of filler tones to the set of IoT devices. Numerous other aspects are described.

A coupled resonator filter including a first parallel resonator including a first capacitance connected in parallel with a first inductance. The filter includes a second parallel resonator including a second capacitance connected in parallel with a second inductance and a third parallel resonator including a third capacitance connected in parallel with a third inductance. Magnetic coupling between the first inductance and the second inductance, between the second inductance and the third inductance, and between the first inductance the third inductance occurs in accordance with first, second and third coupling factors, respectively. A frequency response of the coupled resonator filter includes a notch when values of the first coupling factor, the second coupling factor and the third coupling factor satisfy predetermined conditions.

Each of a plurality of resonators of a filter device is wound around an axis orthogonal to a stacking direction of a plurality of dielectric layers of a stack and is arranged in a manner that an opening of each of the resonators faces one or more openings of one or two other resonators. The plurality of resonators include a first resonator and a second resonator adjacent to each other in a circuit configuration. Each of the first resonator and the second resonator includes a first portion and a second portion arranged with a certain distance in a direction parallel to the axis. The second portion of the first resonator and the first portion of the second resonator are adjacent to each other.

The invention relates to a radio-frequency bandpass filter for an MR apparatus, in particular for a transmission and/or receiving arrangement of the MR apparatus, comprising a resonator arrangement with a signal input, a signal output and at least one resonator, wherein each resonator has a capacitor which is connected in parallel to an inductor, characterized in that the inductor comprises an electrically conductive coil body having a cavity which is closed in a substantially RF-tight manner. As a result, an RF bandpass filter of high quality, high electric load-bearing capacity and simultaneously a low impedance level is achieved which can be produced simply and at low cost.

A multilayer bandpass filter includes an LC resonator inside a multilayer body of stacked dielectric layers. The LC resonator has a loop shape arranged such that a winding axis is perpendicular to a stacking direction of the multilayer body. The LC resonator includes a capacitor conductor pattern, a line conductor pattern and a GND conductor pattern connected by first and second interlayer connecting conductors extending in the stacking direction. A capacitance portion is formed where at least a part of the capacitor conductor pattern and at least a part of the GND conductor pattern face each other on different layers. A length of the first interlayer connecting conductor in the stacking direction defines a via length and a gap between the first and second interlayer connecting conductors defines a line length. The via length is longer than the line length.