30-Way Radial Power Combiner for Miniature GaAs FET Power Amplifiers

Belohoubek, E.; Brown, R.; Johnson, H.; Fathy, Aly E.; Bechtle, D.; Kalokitis, D.; Mykietyn, E.

doi:10.1109/mwsym.1986.1132235

Cited by 32 publications

(12 citation statements)

References 2 publications

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“…To equalize phase, short lines whose characteristic impedance is can be added at the output ports. If the electrical length of the lines connected to ports 1,3,5,6,8,10,11,13,15,16,18, and 20 is , and for the lines connected to ports 2, 4, 7, 9, 12, 14, 17, and 19, then will achieve phase equalization. It will be shown in Section IV that the lines with electrical length can be meandered so all divider output ports are on a square boundary.…”

Section: Tessellated Metamaterials Structurementioning

confidence: 99%

“…However, many microstrip power dividers are either fork, circular or sector shaped [1], and means in-phase output ports are located on a curved (arc or circular) periphery. This requires that the amplifier modules are either located on a circle [3], or if located in a straight line, requires equal length, but nonuniformly meandered interconnecting transmission lines [4], or similar to using waveguide radial combiners [5], a separate printed circuit board (PCB) or microwave integrated circuit is required for each amplifier.…”

Section: Introductionmentioning

confidence: 99%

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Implementation of a Microstrip Square Planar <formula formulatype="inline"><tex Notation="TeX">$N$</tex></formula>-Way Metamaterial Power Divider

Eccleston

Zong

2009

IEEE Trans. Microwave Theory Techn.

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Abstract-This paper describes a compact square-shaped 20-way metamaterial power divider implemented in microstrip technology and lumped capacitors and inductors. The divider comprises 12 square tiles exhibiting left-handed behavior and 13 square tiles exhibiting right-handed behavior arranged in a checkerboard tessellation (or mosaic). The divider relies upon the infinite wavelength phenomena in two dimensions and this requires the left-handed tiles have an insertion phase between any two of its sides equal to, but with opposite sign, of that of the right-handed tiles. To achieve tessellation, both tile types must be the same size. The design method is based upon an analytic formulation, and was applied to the realization of a 20-way power divider operating at 1 GHz that uses surface-mount lumped components. The resulting divider was 50 mm by 50 mm. Over a 10% bandwidth, the measured insertion loss was less than 1.3 dB, the measured couplings track within 1 dB and 6 , and the measured input port return loss and isolation was greater than 20 dB. This level of isolation was achieved without isolation resistors. Equal in-phase power division to output ports on the square-shaped periphery allows compact integration with other planar circuit modules in a combined amplifier. The design method can be extended to -way power division where is an odd integer multiple of 4.Index Terms-Infinite wavelength, left-handed materials, metamaterials, microstrip, microwave circuits, negative refractive index, power combining, power dividers.

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Section: Tessellated Metamaterials Structurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Implementation of a Microstrip Square Planar <formula formulatype="inline"><tex Notation="TeX">$N$</tex></formula>-Way Metamaterial Power Divider

Eccleston

Zong

2009

IEEE Trans. Microwave Theory Techn.

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“…Often the waveguide technology is superior in many applications, due to its low loss, high power handling capacity and relatively large operational bandwidth. Radial combiner (RC) structures lead to a wider operating bandwidth with over 90% combining efficiency when their various sections and junctions are carefully designed [10].…”

Section: Introductionmentioning

confidence: 99%

Broadband Radial Waveguide Power Combiner With Improved Isolation Among Adjacent Output Ports

Sarhan¹,

Ghadimi²,

Hamidi³

et al. 2014

PIER C

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Abstract-An eight-way waveguide-based power combiner/divider is presented and investigated in the frequency range 7.5-10.5 GHz. A simple approach is proposed for design purposes. The measured combiner shows a good agreement between the simulated and measured results. Insertion loss is about −0.3 dB, return loss is less than −15 dB and isolation between adjacent output ports is better than −11 dB at 8.5 GHz and reaches about −14 dB at 9.5 GHz.

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“…At Sarnoff, a radial combiner was developed [2]. Its design story could be one humble example of many that could demonstrate the impact of these developed equivalent circuits concepts.…”

mentioning

confidence: 99%

“…Same applies for radial regions in which one mode is propagating. Subsequently, description of the radial combiner was given in [2] utilizing this concept as will be indicated in the following sections.…”

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confidence: 99%

Development of a radial combiner-a tribute to Nathan Marcuvitz

Fathy

2011

2011 IEEE MTT-S International Microwave Symposium

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Marcuvitz played a key coordinating role in his classic book The Waveguide Handbook, which had an enormous impact on developing the microwave field. The Waveguide Handbook is the most important and most widely used book in the history of the microwave field. The book contained the largest collection of theoretical expressions for waveguide discontinuities available anywhere and, in this respect, it is still unsurpassed. In a masterful summary, Marcuvitz described how these waveguide discontinuities can be represented rigorously in network form, how they can be measured accurately, and how they can be analyzed theoretically. An example, of such impact is touched upon by the story of developing one component-the radial combiner.

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30-Way Radial Power Combiner for Miniature GaAs FET Power Amplifiers

Cited by 32 publications

References 2 publications

Implementation of a Microstrip Square Planar <formula formulatype="inline"><tex Notation="TeX">$N$</tex></formula>-Way Metamaterial Power Divider

Implementation of a Microstrip Square Planar <formula formulatype="inline"><tex Notation="TeX">$N$</tex></formula>-Way Metamaterial Power Divider

Broadband Radial Waveguide Power Combiner With Improved Isolation Among Adjacent Output Ports

Development of a radial combiner-a tribute to Nathan Marcuvitz

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