A $Ku$-Band High-$Q$ Tunable Filter With Stable Tuning Response

Yassini, Bahram; Yu, Ming; Smith, D. J.; Kellett, S.

doi:10.1109/tmtt.2009.2034215

Cited by 38 publications

(11 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…7.Scatter plot of tunability versus resonator Q 0, min. comparing the tunable filter technologies from [8, 9, 11, 13–16, 19, 32, 33] and the present work. Although vaguely defined, the upper right quarter corresponding to high- Q 0, min.…”

Section: Discussionmentioning

confidence: 86%

“…In a broad perspective, these Q limitations set an upper bound to the filters’ selectivity. High- Q tunable resonators featured by some bandpass filter designs, on the other hand, utilize combinations of mechanical [11, 19] or magnetic [7, 20] tuning of dielectric [7, 19], waveguide cavity [11] or yttrium iron garnet (YIG) [20] resonators. All of these designs have Q values above 3200; however, the best tunability they offer is limited to 34%.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A low-loss, continuously tunable microwave notch filter

Acar

Johansen

Zhurbenko

2015

Int. J. Microw. Wireless Technol.

View full text Add to dashboard Cite

The development in high-end microwave transceiver systems toward the software defined radio has brought about the need for tunable frontend filters. Although the problem is being tackled by the microwave community, there still appears to be an unmet demand for practical tunable filter technologies. With this motivation, this work presents a tuning method that delivers a resonator Q0of 2000–3621 within a minimum tuning ratio of 1:1.42. A continuously tunable notch filter based on this tuning method is presented. The design is manufactured, measured, and verified. It is shown that the tuning technology compares favorably to other selected technologies.

show abstract

Section: Discussionmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

A low-loss, continuously tunable microwave notch filter

Acar

Johansen

Zhurbenko

2015

Int. J. Microw. Wireless Technol.

View full text Add to dashboard Cite

show abstract

“…These actuators can be constructed with simple stepper motors [6] or even piezoelectric actuators as shown in the dual mode dielectric resonator tunable filter shown in Figure. 2.2 [7]. A piezoelectric tuning mechanism was also used in a series of works on highly loaded evanescent coupled cavities.…”

Section: Tunable Cavity Filtersmentioning

confidence: 99%

Review on RF Tunable Filters

2017

IJIET

View full text Add to dashboard Cite

-Multi-band radios are necessary nowadays to provide optimal data rates in a network with a varied and greasy landscape of coverage areas (3G, HSPA, LTE, etc.). As required the number of bands are increased, the total cost of discrete RF filters justifies the use of tunable RF filters. Tunable filters are one of the key to signal chain amalgamation. The main requirements for a tunable filter are high unloaded quality factor, wide tuning range, high tuning speed, high linearity, and small size. Tunable filters play a vital role in many RF receiver applications. These filters are used to separate or combine different frequencies bands because the electromagnetic spectrum is limited and has to be shared. Tunable RF filters are used to select or confine the RF signals within assigned spectral limits. Thanks to the numerous technology and the recent developments in design and implementations of the tunable RF filters, usage of these filters has increased exponentially. Emerging applications such as wireless communications continue to challenge RF/microwave filters with ever more stringent requirements higher performance, smaller size, lighter weight, and lower cost. Depending on the requirements and specifications, RF filters may be designed as lumped element or distributed element circuits. They may be realized in various transmission line structures, such as waveguide, coaxial line, and micro strip. Compared to the other types of filter, a tunable filter has its own place. There are many challenging research problems existing with tunable filters. Beginning with an overview of the tunable filters literature, this paper compares and discuss about the various tunable solutions and their issues with different types of tuning. High performance filters necessitate high resonator quality factors. Although filters are traditionally treated as passive devices, tunable filters need to be treated as active devices. Tuning elements invariably introduce non-linearities that limit the useful power handling of the tunable filter.

show abstract

“…Tunable filtering applied to output telecommunication satellite systems has been an essential topic in the passive-component community in the previous decade [1][2][3][4][5][6][7][8][9][10][11][12][13]. The ability to fully tune the waveguide filter response (i.e.…”

Section: Introductionmentioning

confidence: 99%

Reconfigurable diplexer using hybrid couplers and perturbed TE₀₁₂ cavities

Laplanche

Tantot

Delhote

et al. 2021

Int. J. Microw. Wireless Technol.

View full text Add to dashboard Cite

A continuously tunable Ku-band waveguide diplexer is proposed in this paper. This diplexer is based on a hybrid coupler topology and is composed of an input filter centered at 11.9 GHz with a 200 MHz bandwidth, a pair of ladder-type hybrid couplers, and a pair of tunable filters. This diplexer can provide two bandpass channels (channels 1 and 2) that can continuously go from a state where the bandwidths of channels 1 and 2 are maximum (up to 140 MHz) and minimum (down to 40 MHz), respectively, to another configuration where the bandwidth of channel 1 is the largest and the bandwidth of channel 2 is the narrowest. We propose a tunable filter based on TE012 mode circular cavities that are perturbed by low-loss dielectric inserts to obtain such performance. The resonant frequency of these cavities can be continuously tuned between 11.8 and 12 GHz due to the linear movement of the dielectric perturber. The design process for these components is presented and a breadboard device has been manufactured and measured to prove the concept. Different measured configurations of the diplexer are demonstrated, showing that the 200 MHz operating bandpass between 11.8 and 12 GHz can be efficiently separated into two tunable channels. The measured bandwidth of channels 1 and 2 in the manufactured diplexer can be tuned from 135 to 40 MHz (and vice versa) while maintaining an average guard band between the channels of approximately 26 ± 7 MHz. The obtained bandwidth tuning ratios are 3.2 for the highest channel and 3.1 for the lowest channel.

show abstract

A $Ku$-Band High-$Q$ Tunable Filter With Stable Tuning Response

Cited by 38 publications

References 10 publications

A low-loss, continuously tunable microwave notch filter

A low-loss, continuously tunable microwave notch filter

Review on RF Tunable Filters

Reconfigurable diplexer using hybrid couplers and perturbed TE₀₁₂ cavities

Contact Info

Product

Resources

About

A $Ku$-Band High-$Q$ Tunable Filter With Stable Tuning Response

Cited by 38 publications

References 10 publications

A low-loss, continuously tunable microwave notch filter

A low-loss, continuously tunable microwave notch filter

Review on RF Tunable Filters

Reconfigurable diplexer using hybrid couplers and perturbed TE012 cavities

Contact Info

Product

Resources

About

Reconfigurable diplexer using hybrid couplers and perturbed TE₀₁₂ cavities