Model JP520S Rev A Pico Xinger 20dB Directional Coupler Description The JP520S Pico Xinger is a low profile, miniature 20dB directional coupler in an easy to use surface mount package designed for UMTS and WCDMA applications. The JP520S is for power and frequency detection as well as power injection. The JP520S 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. ELECTRICAL SPECIFICATIONS** Features: • • • • • • • • • 2.0 – 2.3 GHz UMTS and WCDMA Very Low Loss High Directivity Surface Mountable Tape and Reel New Pico-Package 100% Tested Lead Free Frequency Mean Coupling Insertion Loss VSWR Freq. Sensitivity GHz dB dB Max Max : 1 dB Max 2.0 – 2.3 20 ± 0.75 0.25 1.22 ± 0.2 Directivity Power Handling ΘJC dB Min Ave CW Watts ºC / Watt ºC 20 25 35 -55 to +85 Operating Temp. **Specification based on performance of unit properly installed on microstrip printed circuit boards with 50 Ω nominal impedance. Specifications subject to change without notice. Top View (Near-side) Pin 1 .250±.010 [6.35±0.25] Side View Bottom View (Far-side) .066±.007 [1.67±0.18] Pin 2 Pin 2 4X .020±.004 [0.51±0.10] Pin 1 GND Orientation Marker Denotes Pin Location .200±.010 [5.08±0.25] .120±.004 [3.05±0.10] 4X .034±.004 SQ [0.86±0.10] GND Pin 4 Denotes Array Number Dimensions are in Inches [Millimeters] JP520S Mechanical Outline Pin 3 Pin 3 .170±.004 [4.32±0.10] Pin 4 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 JP520S Rev A Typical Performance: 1.7 GHz. – 2.6 GHz. Coupling JP520S Return Loss JP520S -19.5 0 -10 Return Loss (dB) Coupling (dB) -20.0 -20.5 -21.0 -21.5 1700 -20 -30 -40 1900 2100 2300 -50 1700 2500 1900 -10 -0.05 -20 -30 2500 -0.10 -0.15 -0.20 -40 -0.25 1900 2100 2300 2500 Frequency (MHz) Anaren uses mean coupling and frequency sensitivity with the coupling specification. The mean coupling value is arrived at by periodically sampling the coupling value over the specified band and averaging the readings. Frequency sensitivity is the peak to peak variation in coupling over the specified band. (315) 432-8909 (800) 544-2414 +44 2392-232392 1700 1900 2100 2300 2500 Frequency (MHz) COUPLING Choice of a coupling value in an application normally depends on the power level of the main (sampled) line. For example, if the coupler is being used to monitor main line power, the coupling value is selected to provide sufficient power to the monitoring device and yet minimize system loss. Note that any coupler reduces power flowing in the main line by the amount coupled off; a 10dB coupler reduces main line power by 1 dB (10%) where a 20dB coupler reduces it by only 0.044dB (1%). USA/Canada: Toll Free: Europe: 2300 Transmission Loss JP520S 0.00 Transmission Loss (dB) Directivity (dB) Directivity JP520S 0 -50 1700 2100 Frequency (MHz) Frequency (MHz) Available on Tape and Reel For Pick and Place Manufacturing. VSWR & DIRECTIVITY In directional couplers, directivity is specified in lieu of isolation. Directivity is a measure of how well the coupled power is isolated from reflections at the main line output port. For example, open or short circuiting the output port of a coupler with 20dB directivity would only affect the coupled output power by 1% and only 0.1% for 30dB directivity. High directivity is especially important if the coupler is being used to measure the VSWR of a device at its output port. In this application, accurate measurements of forward and reverse power are required. In theory, VSWR and directivity characteristics of a coupler are perfect; 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 directivity. The Model JP520S Rev A VSWR & DIRECTIVITY (CONTINUED) internal meandering of the coupled lines and limitations of building perfect 50Ω transitions at the input and output ports of the device are the most significant factors against perfect VSWR and directivity. Typically, VSWR and directivity of 1.15:1 and 25 dB respectively are achieved in practice. INSERTION LOSS Coupler insertion loss is defined as the log of the input power divided by the sum of the power at the two output ports. In practice, typical loss is approximately 0.20 dB. Specification limits are somewhat higher due to imperfect test conditions; surface mount couplers must be tested in test fixtures that negatively affect results. PIN CONFIGURATION The JP520S’s have an orientation marker to denote either pin 1 or pin 2. When the input port is identified, the output, coupled and isolated ports are known automatically. For example, if the input port for a device was selected to be Pin 1, Pin 2 automatically becomes the output port, Pin 4 becomes the coupled port, and Pin 3 is the isolated port. Similarly, if Pin 2 was to be selected as the input port, the adjacent port on the long side (Pin 1) is the output port, the adjacent port on the short side (Pin 3) is the coupled port, and the opposite port (Pin 4) is the isolated port. Either port on the same side as the orientation marker can be selected as the input port, as shown in the table, which shows both pin configurations. The use of pin 1 or pin 2 as the input port ensures phase consistency as well as maximum power handling. MOUNTING For Xinger surface mount couplers to operate optimally, there must be 50Ω transmission lines leading to and from all of the RF ports. To ensure proper electrical and thermal performance, there must be a ground plane with 100% solder connection underneath the part. If either of these two conditions is not satisfied, insertion loss, coupling, VSWR and directivity may not meet published specifications. SUGGESTED FOOTPRINT To ensure proper electrical and thermal performance there must be a ground plane with 100% solder connection underneath the part Multiple plated thru holes to ground .170 [4.32] .120 [3.05] 4X .034 [0.86] 4X .063 SQ [1.60] 4X 50 Transmission Line Dimensions are in Inches [Millimeters] JP520S 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 JP520S Rev A PACKAGING Packaging follows EIA-481-2. Parts are oriented in tape as shown below. 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.
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