Model 1P503 Rev. B Hybrid Couplers 3 dB, 90° Description The 1P503 Pico Xinger is a low profile, miniature 3dB hybrid coupler in an easy to use surface mount package designed for DCS and PCS applications. The 1P503 is designed for balanced amplifiers, variable phase shifters and attenuators, LNAs, signal distribution and is an ideal solution for the ever-increasing demands of the wireless industry for smaller printed circuit boards and high performance. Parts have been subjected to rigorous qualification testing and units are 100% tested. They are manufactured using materials with x and y thermal expansion coefficients compatible with common substrates. Available in both 5 of 6 tin lead (1P503) and 6 of 6 RoHS compliant tin immersion (1P503S). ELECTRICAL SPECIFICATIONS** Features: • • • • • • • • 1.7 – 2.0 GHz. DCS and PCS Low Loss High Isolation 90o Quadrature Surface Mountable Tape And Reel Available in Lead-Free (as illustrated) or TinLead Frequency Isolation Insertion Loss VSWR GHz dB Min dB Max Max:1 1.7 – 1.8 1.8 – 2.0 Amplitude Balance 18 18 Phase Balance 0.25 0.25 1.28 1.28 dB Max Degrees Ave. CW Watts ºC/Watt ºC ± 0.45 ±3 30 27.5 -55 to +85 ± 0.30 ±3 30 27.5 -55 to +85 Power Operating Temp. ΘJC **Specification based on performance of unit properly installed on microstrip printed circuit boards with 50 Ω nominal impedance. Specifications subject to change without notice. Mechanical Outline Pin 1 .250±.010 [6.35±0.25] .053±.011 [1.35±0.27] Pin 2 4X .020±.004 [0.51±0.10] Pin 2 Pin 1 GND .200±.010 [5.08±0.25] GND Pin 4 Denotes Array Number Pin 3 Dimensions are in Inches [Millimeters] 1P503* Mechanical Outline .120±.004 [3.05±0.10] Pin 3 4X .040±.004 SQ [1.01±0.10] .170±.004 [4.32±0.10] Pin 4 *For RoHS Compliant Versions order with S suffix Tolerances are Non-Cumulative Available on Tape and Reel For Pick and Place Manufacturing. USA/Canada: Toll Free: Europe: (315) 432-8909 (800) 544-2414 +44 2392-232392 Model 1P503 Rev. B Typical Performance: 1.6 GHz. to 2.1 GHz. Coupling 1P503S Return Loss 1P503S -2.6 0 -10 Return Loss (dB) Coupling (dB) -2.9 -3.2 -20 -30 -3.5 -40 -3.8 1600 1700 1800 1900 2000 -50 1600 2100 1700 1800 1900 2000 2100 Frequency (MHz) Frequency (MHz) Isolation 1P503S Phase Balance 1P503S -10 -87 Phase Balance (Degrees) -88 Isolation (dB) -20 -30 -40 -89 -90 -91 -92 -50 1600 -93 1700 1800 1900 2000 2100 AMPLITUDE BALANCE 3dB hybrids are a type of backward wave coupler. In the design of these couplers, the even mode impedance was chosen to ‘critically couple’ or slightly ‘over couple’ at mid band to maximize performance and bandwidth. The amplitude balance specification is defined as the difference (in dB) of the signals at the COUPLED port output and the DC port output, when compared to the average output level. PHASE BALANCE In theory, output ports of a backward wave hybrid coupler remain in perfect phase quadrature independent of frequency. In practice, factors associated with the manufacturing processes slightly degrade performance. The specification is typical two to three degrees maximum although in practice, phase balance is statistically better than specified (<1o). USA/Canada: Toll Free: Europe: (315) 432-8909 (800) 544-2414 +44 2392-232392 1600 1700 1800 1900 2000 2100 Frequency (MHz) Frequency (MHz) Available on Tape and Reel For Pick and Place Manufacturing. VSWR & ISOLATION Similar to phase balance, the VSWR and isolation of a coupler are theoretically perfect; where the input and output ports are perfectly matched and no power is coupled to the isolated port. In practice, factors associated with the design and manufacturing processes limit VSWR and isolation. The significant limitations are associated with limitations of building perfect 50Ω transitions at the input and output ports of the device. INSERTION LOSS Coupler insertion loss is defined as the difference of the input power from the sum of the output power. In practice, loss is typically 0.20 dB. Specification limits are somewhat higher due to imperfect test conditions; as the couplers must be tested in fixtures, which negatively affect results. Model 1P503 Rev. B PIN CONFIGURATION electrical and mechanical stability having X and Y thermal coefficient of expansion (CTE) of 17 ppm/oC All of the standard surface mount 3dB hybrid couplers have pin orientations that are symmetrical. When a port is designated as the input, automatically the two output and isolated ports are defined. For example, if the input port for a device was selected to be Pin 1, Pin 2 is automatically the isolated port, Pin 4 is the 0 degree reference output port, and Pin 3 is the output port which “lags” behind the reference output port by 90 degrees. Similarly, if Pin 3 was to be selected as the input port, the adjacent port on the long side (Pin 4) is the isolated port, the adjacent port on the short side (Pin 2) is the 0 degree output port, and the opposite port (Pin 1) is the 90 degree output port. Below is a table of all possible orientations. When a surface mount hybrid coupler is mounted to a printed circuit board, the primary concerns are; insuring the RF pads of the device are in contact with the circuit trace of the PCB and insuring the ground plane of neither the component nor the PCB is in contact with the RF signal. As long as the geometry of the unit fits onto the layout of the circuit trace on the PCB, and the conditions of the previous paragraph are followed, the coupler’s performance is ensured. An example of how the PCB footprint could look is shown below. In specific designs, the 50Ω lines need to be adjusted to the unique dielectric coefficients and thicknesses as well as varying pick and place equipment tolerances. SUGGESTED FOOTPRINT To ensure proper electrical and thermal performance there must be a ground plane with 100% solder conection underneath the part .174 [4.42] MOUNTING In order for Xinger surface mount couplers to work optimally, there must be 50Ω transmission lines leading to and from all of the RF ports. Also, there must be a very good ground plane under the part to ensure proper electrical performance. If either of these two conditions are not satisfied, insertion loss, coupling, VSWR and isolation may not meet published specifications. Overall ground is improved if a dense population of plated through holes connect the top and bottom ground layers of the PCB. This minimizes ground inductance and improves ground continuity. All of the Xinger hybrid and directional couplers are constructed from ceramic filled PTFE composites, which possess excellent Multiple plated thru holes to ground 4X .024 [0.61] 4X .024 [0.61] .124 [3.15] 4X .045 SQ [1.14] 4X .099 [2.51] 4X 50 Ω Transmission Line Dimensions are in Inches [Millimeters] 1P503* Mounting Footprint Available on Tape and Reel For Pick and Place Manufacturing. USA/Canada: Toll Free: Europe: (315) 432-8909 (800) 544-2414 +44 2392-232392 Model 1P503 Rev. B PACKAGING Packaging follows EIA-481-2. Parts are oriented in tape as shown below. Minimum order quantities are 2000 per reel and 77 per tube. Xinger® Tape & Reel Diagram USA/Canada: Toll Free: Europe: (315) 432-8909 (800) 544-2414 +44 2392-232392 Available on Tape and Reel For Pick and Place Manufacturing.