Microwave filter design from a systems perspective

Hunter, I.C.; Ranson, R.; Guyette, Andrew C.; Abunjaileh, Alaa

doi:10.1109/mmm.2007.904718

Cited by 27 publications

(13 citation statements)

References 4 publications

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“…It is observed that the fractional bandwidth of the filter is reduced to 9% with a measured insertion loss of 1.3 dB. The increased insertion is expected as the filter bandwidth is reduced [7], while the resonators' Qs are maintained.…”

Section: Figurementioning

confidence: 94%

“…In this configuration, no admittance inverters are used between different unit cells. This reduces the design complexity of the filter and conserves valuable space, since admittance inverters are usually implemented using distributed techniques at microwave and mm-wave frequencies [5][6][7]. However, because of lack of admittance inverters between different unit cells, the adjacent resonators are combined resulting in reducing the order of filter by 1.…”

Section: Filter Design and Principles Of Operationmentioning

confidence: 99%

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Compact odd‐order band‐pass filters using capacitively coupled spiral resonators

Behdad

2008

Micro & Optical Tech Letters

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former is 0.69. The area of the transformer is very small (35 ϫ 45 m 2 ). EXPERIMENTAL RESULTSThe V-band ILFD was fabricated in TSMC 0.18 m CMOS technology and the chip photo is shown in Figure 3. The die size is only 0.52 ϫ 0.62 mm 2 . The outputs of ILFD are amplified by two open drain buffer amplifiers which the DC power supplies are injected by two external bias-Tees. The measurement is performed via on-wafer probing with Agilent TM signal source generator E8257DA and spectrum analyzer E4448A.The DC power dissipation of divider core and buffer amplifier consumes a current of 3 and 3.85 mA from a 1 V supply, respectively. Figure 4 shows the output spectrum of the fabricated divider with input frequency of 60 GHz. As can be seen, the second harmonic is Ϫ18.5 dB below the fundamental frequency. Figure 5 depicts the tuning characteristics and output power of the 20 GHz oscillator in free-run. The VCO operates from 18.95 to 21.77 GHz with 13.85% tuning range. The output power of the VCO is within Ϫ9.42 Ϯ 1 dBm. Figure 6 plots the locking range with respect to the tuning voltage and injection power. The locking range is 1.75 GHz with injection power of 5 dBm at V tune of 1.8 V. Figure 7 shows the sensitivity of the proposed ILFD. The total tuning range of divider is from 56.5 to 66.4 GHz with 9.9 GHz locking range while varying the tuning voltage V tune from 0 to 1.8 V under the injection power of 5 dBm. Table 1 summarizes the overall performance of the recent ILFD designs. A figure-of-merit (FoM) defined by the ratio of maximum frequency and power dissipation is suggested for a fair comparison. As surveyed from this benchmark, the proposed ILFD achieves the highest FoM among the cited papers [2,4, 8, 9]. Note that this V-band ILFD is implemented in standard 0.18 m CMOS technology. CONCLUSIONThis article proposed a transformer-coupled injection ILFD to overcome the technology limitation. The divide-by-3 60 GHz ILFD has been successfully developed in TSMC 0.18 m CMOS technology. The measured overall locking range is from 56.5 to 66.4 GHz and only consumes a DC power of 3 mW. For the author's best knowledge, this frequency divider operates at much higher frequency with wider locking range and lower power consumption compared with other literature fabricated in 0.18 m CMOS technology. ACKNOWLEDGMENT

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Section: Figurementioning

confidence: 94%

Section: Filter Design and Principles Of Operationmentioning

confidence: 99%

Compact odd‐order band‐pass filters using capacitively coupled spiral resonators

Behdad

2008

Micro & Optical Tech Letters

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“…Thus, the insertion loss will normally be 1.5-2 times higher than the midband value of the pass-band edges." [2] Excessive insertion loss for mid-band frequency of pass-band filter, caused by finite value of quality factor of real world resonators, is proportional to group delay of low-pass prototype for direct current and inverse proportional to quality factor of resonators. In logarithmic scale equation (13) gives:…”

Section: B Case Of the Same Quality Factorsmentioning

confidence: 99%

“…Mass and volume is more or less proportional to third power the size. Consequently as a rule of thumb we can assume that ten times lower Q factor of resonators used can reduce mass of the filter up to one thousand times [2].…”

Section: Introductionmentioning

confidence: 99%

Tuning of coupled resonator LC filter aided by SPICE sensitivity analysis

Izydorczyk

Chojcan

2008

2008 IEEE Region 8 International Conference on Computational Technologies in Electrical and Electronics Engineering

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In the article an example of LC coupled resonator filter is considered. Sensitivity analysis is used to estimate distortion of amplitude response caused by finite value of Q factor of LC resonators the circuit consists of. As a result a generalized version of formulas for distortion of amplitude response, is formulated. Next improved version of predistortion technique is presented. Predistortion is used to construct filters adhering given shape of frequency response using elements with finite value of Q factor.

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“…The low value of Q results in insertion losses and the consequent response distortion. When the filter is used in a receiver, losses also contribute to increase the noise figure of the system [1]. However, losses have been generally neglected in the process of filter synthesis [2]- [4], when they should be taken into account from the very beginning of the design process.…”

Section: Introductionmentioning

confidence: 99%

N × N coupling matrix synthesis of dissipative microwave filters

Navarro-Tapia

Sorolla

Otero

et al. 2011

2011 IEEE MTT-S International Microwave Workshop Series on Millimeter Wave Integration Technologies

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In this communication, the coupling matrix synthesis of dissipative microwave filters is analyzed and compared to the synthesis of lossless filters. A modified definition of the vector matrix product allows using the same synthesis procedure in both cases. The constraint conditions to obtain a symmetric coupling matrix are also presented in the communication. Finally, a synthesis example is presented to show how the proposed method is used.

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Microwave filter design from a systems perspective

Cited by 27 publications

References 4 publications

Compact odd‐order band‐pass filters using capacitively coupled spiral resonators

Compact odd‐order band‐pass filters using capacitively coupled spiral resonators

Tuning of coupled resonator LC filter aided by SPICE sensitivity analysis

N × N coupling matrix synthesis of dissipative microwave filters

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Microwave filter design from a systems perspective

Cited by 27 publications

References 4 publications

Compact odd‐order band‐pass filters using capacitively coupled spiral resonators

Compact odd‐order band‐pass filters using capacitively coupled spiral resonators

Tuning of coupled resonator LC filter aided by SPICE sensitivity analysis

N &#x00D7; N coupling matrix synthesis of dissipative microwave filters

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N × N coupling matrix synthesis of dissipative microwave filters