scholarly journals Compact Unequal Power Divider with Filtering Response

2015 ◽  
Vol 2015 ◽  
pp. 1-7
Author(s):  
Wei-Qiang Pan ◽  
Jin-Xu Xu ◽  
Kai Xu Wang ◽  
Xiao Lan Zhao
Keyword(s):  
Antenna Arrays ◽  
Coupling Strength ◽  
Characteristic Impedance ◽  
Power Divider ◽  
Power Dividers ◽  
Division Ratio ◽  
Transmission Zeros ◽  
Compact Size ◽  
Filtering Function ◽  
Wilkinson Power Dividers

We present a novel unequal power divider with bandpass responses. The proposed power divider consists of five resonators and a resistor. The power division ratio is controlled by altering the coupling strength among the resonators. The output ports have the characteristic impedance of 50 Ω and impedance transformers in classical Wilkinson power dividers are not required in this design. Use of resonators enables the filtering function of the power divider. Two transmission zeros are generated near the passband edges, resulting in quasielliptic bandpass responses. For validation, a 2 : 1 filtering power divider is implemented. The fabricated circuit size is 0.22λg × 0.08λg, featuring compact size for unequal filtering power dividers, which is suitable for the feeding networks of antenna arrays.

scholarly journals Unlimited Power Division Ratio of Microstrip Balanced-to-Unbalanced Gysel-Type Arbitrary Power Divider

Electronics ◽  
2020 ◽  
Vol 9 (7) ◽  
pp. 1124
Author(s):  
Zihui Zhu ◽  
Zhongbao Wang ◽  
Ye Fu ◽  
Shaojun Fang ◽  
Hongmei Liu ◽  
...  
Keyword(s):  
Characteristic Impedance ◽  
Power Divider ◽  
Power Dividers ◽  
Arbitrary Power ◽  
Division Ratio ◽  
Mode Suppression ◽  
High Impedance ◽  
Form Design ◽  
The Common ◽  
Good Agreement

A microstrip balanced-to-unbalanced (BTU) Gysel-type arbitrary power divider without the high-impedance transmission-line (TL) section is proposed to eliminate the power division ratio (PDR) limit of the conventional microstrip BTU power dividers. The proposed circuit includes five moderate-impedance TLs having the same characteristic impedance in addition to a grounded resistor. The arbitrary PDR is easily obtained by varying the electrical length of the TLs without changing the characteristic impedances, especially the large PDR, which is difficult to achieve by means of conventional BTU power dividers. When the PDR is ∞, the proposed circuit becomes a balun. The closed-form design equations are derived and discussed. To verify the proposed circuit, three prototypes I, II, and III are designed and fabricated for PDRs of 10 dB, 20 dB, and ∞ dB, respectively. The measured PDRs are in good agreement with the simulations. The measured isolation between the output ports is higher than 31 dB for prototypes I and II. The measured insertion loss of the balun prototype is 0.194 dB. Furthermore, the common-mode suppression of greater than 32 dB and the return loss of higher than 22 dB are obtained for various PDRs.

A Novel Small-Size Coupled-Line Wilkinson Power Divider for Dual-Band Applications

2013 ◽  
Vol 437 ◽  
pp. 1066-1072 ◽  
Author(s):  
Wei Min Wang ◽  
Yuan An Liu
Keyword(s):  
Design Theory ◽  
Power Divider ◽  
Dual Band ◽  
Coupled Line ◽  
Power Dividers ◽  
Full Wave ◽  
Coupled Lines ◽  
Parameters Analysis ◽  
Wilkinson Power Dividers ◽  
Circuit Configuration

A novel coupled-line circuit configuration is proposed to design small-size dual-band Wilkinson power dividers. This proposed power divider consists of three sections of coupled lines and two isolation resistors. The analytical design theory is given and the electrical parameters analysis is provided. Six numerical examples are presented to demonstrate the flexible dual-band applications. To avoid a negative isolation resistor, a practical power divider operating at 1GHz and 2.2GHz with two positive-value resistors is designed. The calculated and full-wave simulated results verify our proposed idea. Keywords: Coupled-line, dual-band, power divider.

scholarly journals Miniaturization of Broadband Wilkinson Power Dividers

2018 ◽  
Vol 10 (1) ◽  
pp. 241
Author(s):  
Nadera Najib ◽  
Kok Yeow You ◽  
Chia Yew Lee ◽  
Mohamad Ngasri Dimon ◽  
Nor Hisham Khamis
Keyword(s):  
Transmission Lines ◽  
Power Divider ◽  
Center Frequency ◽  
Fractional Bandwidth ◽  
Power Dividers ◽  
The Third ◽  
Operating Frequency Range ◽  
Phase Balance ◽  
Line Design ◽  
Wilkinson Power Dividers

This paper proposed three modified Wilkinson power dividers in order to achieve a size reduction and a wide bandwidth. The first structure presented the power divider using compact folded step impedance transmission lines rather than the uniform microstrip line design for operating center frequency of 3 GHz. The second structure showed the power divider with delta-stub for 2.4 GHz. Finally, the third modified structure introduced the two-section Wilkinson power divider using series-delta stub for center frequency of 2.4 GHz as well. The study managed to get an overall dimension of 15 mm × 9.5 mm for the first proposed design achieving a reduction of 75.6 % and fractional bandwidth of 133 %. For the second proposed structure, the size was 15 mm × 15 mm with a reduction of 56 % and fractional bandwidth of 56 %.  While the third design size was 17 mm × 15 mm with a reduction of 63.6 % and the structure achieved a broadband bandwidth with fractional bandwidth of 220 %.  The proposed power dividers used RT/duroid 5880 substrate with a thickness of 0.38 mm. Simulation and measurement results indicated that the modified power dividers showed equal power division, good phase balance, high isolation between output ports, and good return loss better than -12 dB covering the operating frequency range<strong>.</strong>

scholarly journals A NOVEL COMPACT SIZE WILKINSON POWER DIVIDER WITH TWO TRANSMISSION ZEROS FOR ENHANCED HARMONICS SUPPRESSION

2018 ◽  
Vol 82 ◽  
pp. 67-76
Author(s):  
Eslam N. Mohamed ◽  
Ayman G. Sobih ◽  
Ayman Mohamed Elsayed El-Tager
Keyword(s):  
Power Divider ◽  
Transmission Zeros ◽  
Compact Size ◽  
Wilkinson Power Divider

Seven-Port Unequal Power Divider with Broadband and Large Division Ratio Characteristics Based on T-shape Stub

Frequenz ◽  
2017 ◽  
Vol 71 (11-12) ◽  
Author(s):  
Xing Jiang ◽  
Jia Wei ◽  
Lin Peng ◽  
Shao-Yu Tang
Keyword(s):  
Line Width ◽  
Theoretical Basis ◽  
Matrix Algebra ◽  
Characteristic Impedance ◽  
Power Divider ◽  
Division Ratio ◽  
Conventional Design ◽  
Good Agreement

AbstractA broadband seven-port unequal power divider with large division ratio is designed based on the technique of T-shape stub. A T-shape stub is introduced to replace the conventional design for high characteristic impedance line in realization due to very small line width. The theoretical basis of the proposed T-shape stub is analyzed in detail using the Method of Matrix Algebra Analysis. The proposed design is simulated, fabricated and measured. The measured results are in good agreement with the simulated ones, and a large division ratio of 1:6 is achieved. The operation bandwidth of the proposed design is about 12 % (from 4.8 to 5.4 GHz).

Wideband filtering power divider with deep and wide stopband

2018 ◽  
Vol 10 (9) ◽  
pp. 1011-1018
Author(s):  
Pengcheng Zhang ◽  
Xianqi Lin ◽  
Cong Tang ◽  
Yuan Jiang ◽  
Yong Fan
Keyword(s):  
Transmission Line ◽  
Closed Form ◽  
Design Principle ◽  
Power Divider ◽  
Power Dividers ◽  
Transmission Zeros ◽  
Quarter Wavelength ◽  
Rejection Level ◽  
Form Design ◽  
Good Agreement

AbstractIn this study, wideband bandpass power divider with good out-of-band performance is proposed. Two bandpass filters (BPFs) are utilized to substitute the quarter-wavelength transmission line in conventional Wilkinson power divider. A resistor is specially arranged between two BPFs for a good isolation. Four transmission zeros (TZs) are found to be distributed in the lower and upper stopband of the power divider. Moreover, the locations of two TZs can be shifted by tuning the impedance ratio of the center-loaded open stub, which is propitious to improve the frequency selectivity. Even- and odd-mode methods are applied to analyze the proposed power divider and closed-form design formulas are obtained. Finally, two prototype power dividers with measured rejection level in the upper stopband larger than 29.1 and 32 dB till to 2.7f0 and 2.69f0, respectively, are designed and fabricated to testify the proposed design concept. Good agreement between the simulated and measured results is observed, validating the validity of the proposed design principle.

Stub-Loaded Wilkinson Power Divider with Performance Enhancement

2015 ◽  
Vol 24 (08) ◽  
pp. 1550127
Author(s):  
Huan-Zhu Wang ◽  
Jia-Lin Li ◽  
Jian-Peng Wang ◽  
Wei Shao ◽  
Xue-Song Yang
Keyword(s):  
Transmission Lines ◽  
Performance Enhancement ◽  
Size Reduction ◽  
Power Divider ◽  
Harmonic Suppression ◽  
Power Dividers ◽  
High Impedance ◽  
Wilkinson Power Divider ◽  
Harmonic Components ◽  
Wilkinson Power Dividers

Microstrip Wilkinson power dividers with harmonic suppression and size reduction are investigated. It is found that by loading reactive components at the middle of high impedance transmission lines (TLs), both size reduction and harmonic suppression can be achieved. Analyses and designs of such a kind of power divider are formulated in this paper. To demonstrate the design methodology, two power dividers centered at 1.8 GHz are optimally designed and confirmed by experiments. As compared with conventional Wilkinson power divider, the proposed power divider exhibits 55.6% size reduction, and high suppressions are achieved for 2nd and 3rd harmonic components. Both simulations and measurements are presented with good agreement.

scholarly journals Non-Uniformly Powered and Spaced Corporate Feeding Power Divider for High-Gain Beam with Low SLL in Millimeter-Wave Antenna Array

Sensors ◽  
2020 ◽  
Vol 20 (17) ◽  
pp. 4753
Author(s):  
Md Nazim Uddin ◽  
Sangjo Choi
Keyword(s):  
Antenna Array ◽  
Millimeter Wave ◽  
Antenna Arrays ◽  
Patch Antenna ◽  
High Gain ◽  
Power Divider ◽  
Wave Band ◽  
Power Dividers ◽  
Uniform Spacing ◽  
Parasitic Patch

A corporate feeding antenna array with parasitic patches has been investigated previously for millimeter-wave applications due to its high gain and wide bandwidth. However, the parasitic patch integration in the uniformly powered and spaced patch antenna array led to a high sidelobe level (SLL). In this study, we designed a non-uniformly powered and spaced corporate feeding network to feed a 12-element parasitic patch-integrated microstrip antenna array for SLL reduction at 28 GHz in the millimeter-wave band. In the power divider, we arranged two one-to-six unequally feeding power dividers from the opposite side to feed 12 antenna elements with non-uniform excitation, and effectively controlled the spacing between antenna elements. The two opposite input ports from the power divider were fed 180° out-of-phase for good isolation between the adjacent antenna elements. To verify the SLL reduction effect from the non-uniform spacing in the array, we designed two non-uniformly powered patch antenna arrays with uniform and non-uniform spacing. In the measurement, the non-uniformly powered and spaced patch antenna array demonstrated a nearly 16.56 dBi boresight gain and −17.27 dB SLL, which is nearly 2 dB lower than the uniformly spaced counterpart. Finally, we expect that the non-uniformly powered and spaced high gain patch antenna array with a low SLL will be suitable for millimeter-wave communication applications.

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